BOSTON (Reuters) - A Boston-area man accused of threatening to blow up an airplane allegedly had all the materials needed to build a pressure-cooker bomb before this kind of weapon was used in the Boston Marathon attack in April, according to comments made by the man’s mother in a recently unsealed police affidavit. 
 
 Flowers lay on the sidewalk at the site of the first explosion as people walk along Boylston Street after the street reopened to the public for the first time since the Boston Marathon bombings in Boston, Massachusetts April 24, 2013. REUTERS/Jessica Rinaldi 
 
 While investigators working with the FBI are looking to see if there are any links between the two cases, they have drawn no conclusions, according to two law enforcement sources. Prosecutors and the FBI declined to comment. 
 
 The FBI Joint Terrorism Task Force said it is investigating 27-year-old Daniel Morley after police in the small town of Topsfield, Massachusetts found a cache of weapons and bomb-making materials in his home on June 9. 
 
 According to a police affidavit dated June 19, Morley told his mother that his best friend had bragged about knowing Tamerlan Tsarnaev, one of the two Chechen brothers suspected of detonating pressure-cooker bombs at the Boston Marathon finish line on April 15. Tsarnaev was killed in a shootout with police after the attack. 
 
 No one else has been charged in the Topsfield case, a spokeswoman for the Essex County District Attorney said. 
 
 The 25-page police affidavit details the allegations that served as the basis for the criminal charges against Morley. He is accused of assaulting his mother and her boyfriend and making a threat to hijack an airplane or ship. 
 
 Morley’s defense attorney, Robert LeBlanc, did not return calls asking for comment. The person described by Morley’s mother as his best friend was named in the affidavit. Reuters could not reach him for comment. 
 
 Topsfield police said they found in Morley’s bedroom closet a large, stainless steel pressure cooker and a black duffel bag. He also had materials to make a shrapnel bomb, such as black powder, igniters and pieces of metal that included ball bearings. In addition, he had a large assault rifle and a handgun, the affidavit shows. 
 
 Morley’s mother told police that her son had the pressure cooker and the other materials before the Boston Marathon attacks, according to the affidavit. 
 
 AMMUNITION AND A DRAWING 
 
 Police said they also found several hundred rounds of ammunition and a drawing of what appeared to be the Boston skyline, with an airplane in the left hand corner and a figure of a man with a blue heart in his chest, holding a red heart in his hand. 
 
 “While very stylized, the image does seem to match up with a portion of the Boston skyline,” the affidavit quoted anti-terrorism expert Clairissa Breen, who is part of the Joint Terrorism Task Force, as saying. “This could mean that something in that area is a target, or it could be artistic license.” 
 
 The allegations outlined in the affidavit prompted the Topsfield police to contact the FBI Joint Terrorism Task Force. One focus of the FBI’s investigation is determining whether Morley was being influenced by others when he made the alleged airplane threat, according to the affidavit. 
 
 Police also said they found a shoe box with the head of a decapitated bird, dismantled cell phones, flex cuff restraints, black gun powder, and a burnt green stuffed animal that had been stabbed repeatedly. Other items included a bucket with aluminum foil and steel containers with concealment cutouts. 
 
 Police said they discovered all of the items last month after Morley told his mother and her boyfriend that he planned to burn down their house. Morley had moved in with them after being hit by a car while riding his bike in Boston. 
 
 “It’s all been a big shock. I can’t really help you,” said Morley’s mother, Glenda Duckworth, when contacted by Reuters. 
 
 Morley was placed in custody on June 9 after a nearly four-hour standoff that closed Topsfield’s picturesque town center. 
 
 He is described by his mother in the search warrant affidavit as very bright, but troubled. After being arrested, police said he apologized to them for not taking his medications, which were not detailed in the affidavit. 
 
 Morley is undergoing psychiatric evaluation at Bridgewater State Hospital, according to his criminal case file put together by prosecutors. His next court appearance is set for Thursday at Ipswich District Court in Newburyport. 
 
 “Morley advised his mother that he separated from (his best friend) because he was attempting to have him do something really bad, but Daniel did not want to do,” according to the police affidavit. ||||| UPDATE: Topsfield man arrested after bomb scare; Pressure cooker found in home. 
 
 A Topsfield man was arrested on bomb scare charges early Sunday morning, June 9 after a domestic disturbance call led the police to his Washington Street home where they found a pressure cooker in his possession. 
 
 Police say Daniel P. Morley, 27, made threats that the pressure cooker was explosive, which led them to call in the state police Special Tactical Operations (STOP) team. Middleton, Wenham and a couple other police departments and ambulance personnel also responded to the scene. 
 
 Topsfield Police Chief Evan Haglund said that the device was ultimately found to be non-explosive. 
 
 Morley also threatened to burn down the residence. 
 
 He was charged with communicating a bomb scare, threatening to commit arson and two counts of domestic assault and battery. 
 
 Police were initially called to the residence at 2:46 a.m. on Sunday morning when family members reported that Morley assaulted and threatened them. Officers investigated the residence and found a loaded bolt-action rifle, handgun, ammunition and knives in the suspect’s bedroom, according to police. Police then found the pressure cooker, which is when they called the STOP team. 
 
 Once STOP confirmed that the device was non-explosive, custody of Morley was returned to the Topsfield police. 
 
 Topsfield police sent out a Nixle alert to subscribing residents at 7:36 a.m. on Sunday saying that Washington and Main streets were closed due to a public safety emergency. Police sent out another alert at 9:30 a.m. saying the roads were reopened. 
 
 Morley was taken to Bridgewater State Hospital on Sunday night and was scheduled for arraignment on Monday at Ipswich District Court in Newburyport as long as his health permits. 
 
 The case remains under investigation and additional charges may be forthcoming. ||||| FBI / AP This image from a Federal Bureau of Investigation and Department of Homeland Security joint bulletin shows the remains of a pressure-cooker bomb that exploded during the Boston Marathon, the FBI says. 
 
 The FBI’s lead investigator into the Boston Marathon bombings on Tuesday made a passionate plea for information from the public, saying the “range of suspects and motives remains wide open” as the probe into who might be responsible for the attacks begins. 
 
 “Someone knows who did this,” said Richard DesLauriers, the special agent in charge of the FBI’s Boston office. “Importantly, the person who did this is someone’s friend, neighbor, coworker or relative. We are asking anyone who may have heard someone speak about the marathon, or the date of April 15, in any way that indicated that he or she may have targeted this event to call us.” 
 
 FBI / AP The remains of a black backpack that the FBI says contained one of the bombs that exploded during the Boston Marathon. 
 
 DesLauriers told reporters in an afternoon briefing that the FBI has received more than 2,000 tips as of midday Tuesday, and investigators have already vetted some of those. In addition, many people and businesses have submitted photographs and video of the scene near the marathon’s finish line where the blasts occurred. 
 
 Still, investigators have no firm suspects in the case and no groups or people have stepped forward to claim responsibility for the attack that killed three people and injured at least 176. 
 
 “At this time,” DesLauriers said. “there have been no claims of responsibility.” 
 
 Federal prosecutors are preparing a limited number of search warrants in the Boston area in their search for evidence in the bombing, a senior federal law enforcement official told NBC News. 
 
 And, late Tuesday the FBI released photos showing contorted metal that it said were the remains of one of the pressure-cooker bombs used in the Boston Marathon attack. 
 
 'Weeding through' evidence 
 
 Agents are "weeding through" the evidence, the official said. But the searches do not indicate that agents have any hard leads right now into who was behind the bombing, the official said, adding that the number of search warrants are "less than a half dozen." 
 
 More than a day after the bombs went off, crime scene processing continues with hundreds of hours of video simultaneously being viewed, a federal official said. At some point FBI behavioral profilers will join in the analysis, officials said, as they begin their effort to put together who the person or persons were who launched the attack. 
 
 Investigators have begun the process of recovering tiny pieces of bombs to learn how they were made. So far, they know the bombs were made from pressure cookers filled with ball bearings and nails – a method used for decades in terror bombings. But no suspects are in custody and investigators are asking the public for help. NBC's Pete Williams reports. 
 
 Investigators have found fragments of dark or black nylon, which were possibly from a bag or backpack that contained the bombs. In addition, pieces of what is believed to have been a pressure cooker used in making the bomb have been discovered. 
 
 Those pieces of evidence, along with others, are being sent to the FBI’s lab in Quantico, Va., for testing to determine if they were indeed part of the bomb. The lab will attempt to reconstruct the explosive devices to determine their origin, DesLauriers said. 
 
 "This is a painful and tragic lesson, but we will learn from this as well," said Massachusetts Gov. Deval Patrick. 
 
 Patrick also announced that President Barack Obama would attend an interfaith service honoring the victims of the tragedy at 11 a.m. on Thursday at Cathedral of the Holy Cross in South Boston. 
 
 Sources involved in the investigation said late Tuesday that the pressure-cooker bombs were powerful "homemade claymore," directional explosives that appeared to include a triggering mechanism using a battery pack and a circuit board. Both of those elements were recovered at the scene. 
 
 "It appeared to be built from scratch but with a sophisticated triggering mechanism. And frankly, at the end of the day, all bombs are crude devices, and it is the way they are triggered that can be sophisticated," said one official with strong knowledge of explosives. "They functioned as designed." 
 
 According to a FBI-Department of Homeland Security document, a preliminary examination of photographs and on-scene reports show that one of the bombs consisted of a pressure cooker with an undetermined main charge. The other device was also housed in a metal container, but so far there is not enough evidence to determine if it was also a pressure cooker, the document stated. 
 
 The two Boston Marathon bombs appeared to have each contained tiny nails – smaller than the ones used to hang pictures, “fine nails” or brads, according to one of the people assigned to the case. And the devices themselves appear to have been delivered to the scene in two duffle bags. 
 
 Nicholas Yanni, who sustained injuries during the explosion at the Boston Marathon, talks about the bombing at a news conference Tuesday. 
 
 'To the ends of the earth' 
 
 DesLauriers earlier vowed to go “to the ends of the earth” to find those responsible. But a day after the explosions, Obama said that authorities did not know whether the attack was foreign or domestic, the work of a group or an individual, or what the motive might be. 
 
 According to federal officials, there is no indication currently of any overseas involvement or direction in the attacks, and although the case is being handled by the international terrorism section of the FBI, that is simply a matter of resources, and if it turns out to be domestic the command of the incident will simply be switched. 
 
 Law enforcement officials told NBC News that the explosives were classified as low — meaning that they traveled at under 3,300 feet per second. That is not enough to create a blast wave, which can kill people from air compression and blow out faraway windows, but it is enough to propel shrapnel a great distance. 
 
 A pressure cooker, in its everyday use, speeds cooking by creating a tight seal and building pressure inside the pot. Converting it to a bomb sheaths the explosives in a metal casing, which blows apart when the bomb is detonated and adds to the shrapnel already packed inside. 
 
 Rep. Michael McCaul, R-Texas, chair of the House Homeland Security Committee, said that he knew of two ways to detonate a pressure cooker bomb — with a device placed on the cooker or by remote, such as by cellphone. Law enforcement could use records to track a cellphone detonation, he said. 
 
 One of the three devices that was to be used in an attempted bomb attack in Times Square in 2010 was a pressure cooker. Earlier that year, terrorists used a pressure cooker bomb in an attack in Pakistan. And in 2006, more than 130 people were killed on the transit system of Mumbai, India, when pressure cookers loaded with explosives were placed on trains. 
 
 In the hunt for clues in Boston, informal public efforts sprang up almost immediately to scour the mass of photos and video already posted on Twitter, Facebook and other sites. Authorities added their own call for help, hoping that in an era of ever-present smartphones, race fans might be holding evidence without even knowing it. 
 
 “There has to be hundreds, if not thousands, of photographs, videos and other observations that were made down at that finish line yesterday,” said Timothy Alben, superintendent of the Massachusetts State Police. “You might not think it’s significant, but it might have some value to this investigation.” 
 
 From the White House, Obama praised acts of heroism after the explosions and said that the investigation would take time. 
 
 Obama: 'We will bring them to justice' 
 
 “We will find whoever harmed our citizens, and we will bring them to justice,” he vowed. “We also know this: The American people refuse to be terrorized.” 
 
 Authorities confirmed at a mid-morning news conference that only two bombs went off Monday. Contradicting reports from the chaotic early hours after the blasts, they said that no unexploded devices were found. 
 
 Overnight, law enforcement officials searched a suburban Boston apartment building, interviewed a man and removed a duffel bag and two trash bags. But a law enforcement official later told NBC News that nothing of interest was found. They also issued alerts for a rental van and a man seen leaving the scene of the blasts. 
 
 Law enforcement officials also told NBC News that the bombs, which detonated seconds apart, were packed with ball bearings and BBs, apparently intended to increase the casualties. The blasts turned the finish line of the marathon into a hellish scene of panicked spectators, shattered glass and blood-spattered sidewalks. 
 
 Twitter Martin Richard, 8, was killed in the marathon bombing. 
 
 Among the dead was an 8-year-old Boston boy, Martin Richard, who was waiting at the finish. Krystle Campbell, 29, of the Boston suburb of Medford, was also killed, her father told NBC News. The Chinese consulate in New York said the third victim was a Chinese national. The victim, whose family has requested she not be identified, was also a student at Boston University, the school said. 
 
 As of 3:30 p.m. ET, there were 72 patients from the blasts still being treated at six Boston hospitals, including some who had injuries described as “limb-threatening.” An official at Boston Children’s Hospital said the youngest victim was a 2-year-old boy with a head injury. 
 
 Among the other injured were brothers, 33 and 31, who each lost a leg from the knee down. Dr. George Velmahos, chief of trauma at Massachusetts General Hospital, told reporters that surgeons had removed pellets, nails and other shrapnel from the bodies of patients. They bled heavily, and some required amputations, he said. 
 
 Investigators were studying surveillance video to look for anyone placing packages at the points where the bombs exploded. Law enforcement officials said there was video showing a person, from the back, carrying two backpacks, but they said it was too soon to know whether that was related to the attack. 
 
 The Boston police commissioner called the resulting crime scene the most complex that the department has ever dealt with, and said all sworn officers were working around the clock. The FBI took charge, but an array of law enforcement agencies joined the hunt. Leads poured in. 
 
 Investigators picked through mounds of personal belongings left by some of the thousands of people who fled the finish line, at Boylston Street, after gathering for perhaps the most joyous day on the Boston calendar — Patriots Day. 
 
 Authorities at all levels asked for patience. Sen. Dianne Feinstein, D-Calif., the chair of the Senate Intelligence Committee, said that she had great faith that an arrest would be made. 
 
 NBC News chief justice correspondent Pete Williams discusses the latest on the Boston Marathon bombing, saying investigators spoke at length with a 20-year-old student yesterday, whose apartment was searched overnight. 
 
 “I don’t think it’s going to be the day after tomorrow. But that’s OK. It’s going to happen,” she said. “You cannot do this in the United States.” 
 
 Public officials have repeatedly praised spectators, runners and race volunteers for charging in to help. One in particular gained online fame — a man named Carlos Arredondo who was pictured in a photo helping rush a gray-faced young man in a wheelchair to safety, pinching what appeared to be a protruding artery to stop the blood. 
 
 Do you know a Boston hero? Tell NBC News 
 
 Obama cited runners who had kept going after the race to get to hospitals, and people who tore off clothes to make tourniquets. 
 
 “If you want to know who we are, what America is, how we respond to evil, that’s it,” he said. “Selflessly, compassionately, unafraid.” 
 
 Gov. Patrick and Boston Mayor Thomas Menino said a new centralized fund was set up in order to to gather donations to help families affected by the tragedy. Called The One Fund Boston, contributions can be made through a website, onefundboston.org. 
 
 Firefighters spent the night chasing bomb scares around a jittery city, and the country was on edge on the day after the explosions. A terminal at LaGuardia Airport in New York, a plane in Boston and part of the Cleveland transit system were briefly cleared because of suspicious packages. Authorities in big cities increased security. 
 
 A fire at the John F. Kennedy presidential library in Boston more than an hour after the blasts, initially treated by investigators as related, appeared be caused by a simple electrical short, police said. 
 
 The blasts went off just before 3 p.m., with thousands of runners still on the course. They sent up white plumes of smoke, rattled police barricades and stiffened flags set up to celebrate the 96 countries that sent runners to the most prestigious road race. 
 
 Boston Globe senior sports reporter Steve Silva was covering the Boston Marathon yesterday when he caught the explosions on tape, and finish line coordinator Tom Meagher ran to the aid of a fallen runner. The two men talk about the tragedy they witnessed. 
 
 “In 28 years, this is definitely the worst I’ve seen,” said Chief Ron Harrington of the Boston Fire Department’s District 3. “Bodies and body parts. Blood all over. A little boy lying in the street. A young woman in her 20s. Both dead. It was mayhem. I saw two people with arms hanging loose, and one without a leg. A shoe with flesh still in it.” 
 
 Law enforcement officials told NBC News that authorities questioned a 20-year-old man who is in the United States on a valid student visa. He was seen running from the blast area, had burns and was interviewed in a Boston hospital. But an official told NBC News that interest in the man was fading. It was his apartment building, in the Boston suburb of Revere, that police and federal agents searched overnight. 
 
 The race drew 27,000 runners and has been run since 1897 on Patriots Day, the third Monday in April, which commemorates Lexington and Concord, the two battles in Massachusetts that started the American Revolution. 
 
 The year, the race coincided with the filing deadline for federal taxes. Security experts said the FBI would undoubtedly look into the possible significance of the date as they tried to find the bomber and the motive. 
 
 Michael Isikoff, Jeff Black, Jonathan Dienst and Michael Kosnar of NBC News contributed to this report. 
 
 Related: 
 
 Bomb type gives first clue on path to perpetrator 
 
 Pressure cooker bombs used around the world for years 
 
 
 
 Who is the hero in the cowboy hat at the finish line? 
 
 Timeline of a tragedy: What happened when 
 
 Full coverage of Boston Marathon bombings from NBC News 
 
 Source: NBC News, Boston Globe, Boston Athletic Association 
 
 This story was originally published on
– A man who was arrested June 9 in the Boston area had the necessary materials for building a pressure-cooker bomb like the kind used in the marathon attacks, according to recently unsealed police documents. And according to Daniel Morley's mother, he'd had the materials prior to the April marathon bombings. Now the FBI is investigating him and any possible links between the two cases, Reuters reports. Wicked Local reports that the 27-year-old was taken into custody after police responded to a domestic disturbance; Reuters reports he allegedly assaulted his mother and her boyfriend and threatened to blow up a plane. After Morley's arrest, police found weapons including an assault rifle and a handgun, a pressure cooker and other bomb materials, several hundred rounds of ammo, a black duffel bag, and some even weirder items (a bird's head in a shoebox, a burned and stabbed stuffed animal, a drawing of what appears to be the Boston skyline and a plane) in his home. Morley's mother also said her son told her that his best friend boasted of knowing Tamerlan Tsarnaev. And according to the affidavit, that friend "was attempting to have him do something really bad, but Daniel did not want to do," or so Morley told his mother. Morley is currently at a state hospital undergoing psychiatric evaluation.