The Detroit teen was detained by police Monday. (Photo: File photo) 
 
 A Detroit teen was stopped during an alleged robbery at a Chase bank on the west side Monday after a quick-thinking teller locked him between a set of automatic doors until police came. 
 
 Detroit Police Officer Dan Donakowski said the 15-year-old boy walked into the bank located in the 15000 block of West 7 Mile around 2 p.m. and demanded money. 
 
 Donakowski said the teen gave the teller a note and threatened to use a bomb if she didn't fork over the cash. 
 
 "The teller complied, gave him some money and as he attempted to leave, the teller hit the button for the doors that automatically lock and the suspect was trapped inside," Donakowski said. 
 
 The teen was detained by police and transported to a juvenile facility, he said. It's unclear if the teen had a weapon, Donakowski said, adding that he believed the teen only had a note in his possession. 
 
 Contact Katrease Stafford: kstafford@freepress.com or 313-223-4759. 
 
 Read or Share this story: http://on.freep.com/1R9sfsD ||||| DETROIT, MI -- The teen bank robber almost made it, until he realized he was a sitting duck. 
 
 Police say a 16-year-old, of Detroit, entered Chase Bank located on Seven Mile on Detroit's east side about 2:30 p.m. Monday. 
 
 He walked up to the counter and told the teller he was strapped with a bomb and to give him all the money, Detroit Police Officer Jennifer Moreno said. 
 
 The teller did. The teen set off for the doorway, likely exhilarated by the scent of escaping with his new wealth. 
 
 He opened the first set of doors into the causeway. The sidewalk was only steps away. He made it to the outermost set of doors, inches from the outside world. 
 
 He'd make it no further. After realizing they wouldn't budge, he tried to retreat through the door he'd just passed. They wouldn't budge either. 
 
 The teller engaged what is called a "man-trap," basically a security system that locks would-be intruders between the two sets of doors leading outside where they remain caged until police can arrive and take them safely into custody, which Detroit police soon did. 
 
 Often the glass is also bulletproof. 
 
 It's not clear if the teen will face charges as a juvenile or in the adult court system. ||||| A "brazen" trio has robbed nearly two dozen Los Angeles area banks in the span of seven months and police, worried that the bandits' attempts may become violent, appealed last week to the public for help in catching them. 
 
 The suspects are still on the loose, Det. Joe Harris with the Los Angeles Police Department's Robbery-Homicide Division told NBC News Friday, a week after the department released security footage of the three men and asked the public to call in any information that might lead to their arrests. 
 
 The LAPD decided to release the videos because police have "had it" with the volume of heists connected with the group — 23 since November, Harris said. 
 
 "They're hitting all over the place," he said. 
 
 Typically, the thieves casually walk into their target bank and one hands a teller a note, according to the LAPD. "They demand money and claim to be armed while threatening violence if their demands are not met," said a statement from the department. 
 
 No one has been physically hurt to date by the robbers, who have been dubbed the "Cold Hand Bandits" because one of the suspects wore winter gloves during one of the first robberies, said Laura Eimiller with the Los Angeles FBI office. But authorities worry that the violent threats on the notes might become reality if the robbers don't get what they want. 
 
 LAPD's robbery homicide division seeks the public's help in identifying bank robbery suspect. LAPD 
 
 The FBI is working with the LAPD, along with the Los Angeles County Sheriff's Department, Alhambra Police Department, Pasadena Police Department and Long Beach Police Department to identify and catch the three suspects, who are considered "armed and dangerous," according to the LAPD. 
 
 "It is scary," said the manager of a bank that the "Cold Hand Bandits" have robbed twice. 
 
 The manager, who didn't want to be identified for security reasons, told NBC News she will be on edge until the robbers are caught, but the chance of robberies is always a fear. "Working with cash, that’s the worry that we have every day," she said. 
 
 The most recent robbery took place in late April and was a repeat performance at a bank in the city of Artesia that the suspects had robbed ten days earlier, according to security footage released by the LAPD that showed portions of five different robberies. 
 
 Footage from April 18 shows a single robber handing a teller a note and then exiting with a wad of cash she hands him. 
 
 In footage from April 28, one of the suspects wanders the lobby of the bank, brandishing what appears to be a gun, while another suspect jumps over the counter. At least two tellers drop to the floor as the robber behind the counter opens drawers, using his shirt in an apparent bid to avoid leaving behind fingerprints. 
 
 One teller gets up to open a drawer that requires a key, and the robber fills a bag with what appears to be cash before he and the man with the gun run out of the bank. 
 
 "This isn’t amateur hour," Det. Charles Geiger of the LAPD’s Robbery-Homicide Division told NBC Los Angeles. "The next level is people get tied up, maybe somebody gets hurt.”
– A teenage would-be bank robber in Detroit found himself imprisoned—and presumably regretting one or two life choices—within seconds of being handed money at a bank on Monday, police say. A police spokesman tells the Detroit Free Press that the 15-year-old gave a teller a note claiming he had a bomb and demanding money. As he left with the cash, the teller hit a button that trapped the youth between two sets of doors. The security system, known as a "man-trap," keeps intruders caged until police arrive, MLive reports. Police say the teen, who didn't have any explosives on him, was taken to a juvenile detention facility. (A man who stole a restaurant's tip jar ended up losing money.)