CHASKA (AP) -- Authorities weren't sure what caused the roof of a former motorcycle shop to collapse, killing one of the two children inside.
The heavy asphalt roof fell in about 4:30 p.m. Wednesday, landing flat just a foot above the ground. The survivor was able to get out and summon help.
''It was just a big boom, dust was flying everywhere,'' witness Stan West said. ''We heard everybody running over and on top of it, screaming this guy's name.''
Workers pulled out the body of the 12-year-old Chaska boy about an hour later, Police Chief Scott Knight said.
''This is a major tragedy,'' Knight said, noting that many of the rescuers knew the boy and his family.
Two buildings next to the collapsed building were razed earlier Wednesday. But Knight said he didn't know what caused the collapse or how workers planned to knock down the building.
The boy's father was on the construction site during the collapse, but Knight wasn't sure what the father's job at the site was. Knight said the father had no reason to believe there was any danger in letting his son go into the building.
''There would have been no way if he had any clue (the roof might collapse) he would have let his child do it,'' Knight said.
Randy Worm, a distant cousin of the boy, said the father worked for the city's electric department. He fought back tears when talking about the boy.
''He liked to help his dad. He was a decent little kid,'' he said.
Mesh fencing surrounded the building that collapsed, but Knight said he wasn't sure what other precautions were taken to keep people out. He said police would help the state Occupational Safety and Health Division investigate the accident.
The collapsed building had been vacant about two weeks. It and the other two other buildings were to be demolished Wednesday to make way for a new bank and retail space, Knight said.
Authorities declined to release the boy's name until all his relatives could be notified.
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