In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: BAGHDAD (AP) — A pair of bomb blasts targeting a market in central Baghdad Saturday killed at least 28 people and wounded at least 54, according to police and medical officials. 
  
 The attacks took place early Saturday morning in al-Sinak, a busy market selling car accessories, food and clothes as well as agricultural seeds and machinery. 
  
 Details were sketchy in the immediate aftermath. Police at first said a pair of back-to-back roadside bombs exploded. Later a police official said first a roadside bomb exploded, then a suicide bomber detonated his device amid the crowd that had gathered. Finally police concluded that the carnage was the work of a pair of suicide bombers 
  
 All officials spoke on condition of anonymity because they were not authorized to release the information. 
  
 No group has claimed responsibility for the blasts, but the Islamic State group has launched near-daily attacks in the capital in recent months. ||||| SADA, Iraq (Reuters) - The earth shook three times with the impact of air strikes targeting Islamic State positions north of Mosul. Only then did the Iraqi troops assembled on the edge of the small farming village advance. 
  
 The army had gathered on Friday afternoon in a muddy street that showed signs of heavy fighting with the jihadists from a day earlier: store fronts shorn off, electricity poles pulled down, bullet casings carpeting the ground. A rooftop sentinel kept watch. 
  
 The Iraqis’ tan-colored Humvees, reinforced with steel plates around the wheels to guard against sniper fire, were dwarfed by four MRAPs (mine-resistant ambush-protected vehicles) manned by U.S. military advisers. 
  
 The second phase of the operation to retake Mosul, Islamic State’s last major stronghold in Iraq, began on Thursday after several weeks of deadlock in the most complex operation in the country since the 2003 U.S.-led invasion. 
  
 Conventional U.S. forces deploying more extensively in this phase are now visible very close to the front lines. They are backing Iraq’s army, federal police and counter-terrorism service (CTS), whose levels of training and experience vary widely. 
  
 Since the offensive began 10 weeks ago, CTS punched into Mosul from the east and took a quarter of the city, but regular army troops like those in Sada have made slower progress advancing from the north and south, slowing the operation. 
  
 Iraqi soldiers carry weapons during a battle with Islamic State, north of Mosul, Iraq, December 30, 2016. REUTERS/Khalid al Mousily 
  
 MARGINAL ADVANTAGE 
  
 Western officials from a coalition providing air support, training and advice to the Iraqi military have hailed the recovery of the army and police, which dropped their weapons and fled Islamic State’s blitz across a third of the country in 2014 despite billions of dollars in U.S. support. 
  
 “They don’t have to be as good as us, they just have to be better than Daesh,” one U.S. military official told Reuters earlier this year, using an Arabic acronym for Islamic State. 
  
 That marginal advantage, though, means the Mosul campaign is likely to drag on for many months and could wreak significant destruction. 
  
 During earlier battles like the one in Ramadi a year ago, coalition officials said they often had to prod the Iraqis to advance rather than wait for aerial bombardment to eliminate all enemy positions. 
  
 The Iraqi commanders in Sada huddled with the Americans for a few minutes on Friday, and after the third air strike piled into their vehicles. Half a dozen Humvees charged ahead, firing mounted machine guns and a rocket-propelled grenade. 
  
 As the sound of gunfire pierced the clear blue sky, the U.S. vehicles followed them down the road and appeared to establish overwatch positions in an adjacent field. 
  
 “The Americans came this morning. They are for guidance and direction only,” said one Iraqi soldier, a bandoleer hanging around his shoulders. “They don’t enter combat. They will turn and have our backs.” 
  
 Slideshow (2 Images) 
  
 Behind the Americans came a dozen more Iraqi Humvees, some of whose occupants fired wildly as they advanced. One soldier standing in the bed of a military truck lost balance and nearly tumbled out when the vehicle lurched forward. 
  
 Army officers said intelligence suggested about 30 Islamic State fighters were holed up inside the village with two car bombs and a truck bomb and were using tunnels between houses and into agricultural areas to furtively resupply or launch attacks. 
  
 Inside Sada, reporters saw the bodies of a dozen Islamic State fighters the army said were killed in earlier clashes. A soldier held up the severed head of one, an expression of shock still on its face. |||||
A: 
A pair of suicide bombings minutes apart hit a central Baghdad market on Saturday, killing 28 people and wounding at least 54, prompting security forces to ban traffic from key streets at the center of the Iraqi capital, police and hospital officials, the AP reports. The twin attacks hit al-Sinak, a busy market selling car accessories, food and clothes as well as agricultural seeds and machinery. Minutes after the first suicide bomber detonated his explosives-laden belt, the second one struck amid the crowd that gathered, according to the officials. ISIS claimed responsibility for the attacks in a statement posted by its Aamaq news agency, confirming that the blasts came from a pair of suicide bombers. Later on Saturday, three separate attacks in and around Baghdad killed eight people and wounded 17. Those killed included one policeman. The attacks came after Iraqi forces moved into the second phase of the operation to retake Mosul following weeks of deadlock, Reuters reports.