The scene of a building collapse in Philadelphia. / CBS
A four-story building being demolished collapsed onto a Salvation Army store in downtown Philadelphia on Wednesday, killing six people and injuring at least 13 others.
Mayor Michael Nutter said those who died were one man and five women, but authorities still didn't know how many people had been in the store or on the sidewalk when the accident happened.
Deputy Fire Chief Robert Coyne said early Thursday that the 14th survivor, Myra Plekam, 61, was pulled from the debris more than 12 hours after the building collapsed. He said she was awake and talking to rescuers.
An early report from the mayor said a 35-year-old woman died in the Wednesday morning accident.
Rescuers using buckets and their bare hands to move bricks and rubble kept working through the evening. Body bags were removed from the collapse site at night.
Nutter said the city's emergency workers had been "diligent, determined, focused" in their rescue efforts. "If anyone else is in that building, they will find them."
More than 100 first responders and bystanders used their hands and buckets to pull 13 people from the rubble, Philadelphia Fire Battalion Chief Michael Richey said.
A 66-year-old woman who was trapped more than two hours was listed in serious but stable condition.
"She actually was walking out of the debris. We were very happy with that," Richey said. The others were "walking wounded" with minor injuries, he added.
One witness, Jordan McLaughlin, told CNN that workers were apparently knocking down the taller building "and it collapsed the wrong way."
"There was a big aftershock," he said. "There were people that fell over. There were people screaming and running across the street. We could hear people screaming inside the building," he said.
The fire commissioner said the biggest challenge for rescue teams was using heavy equipment is "getting people disentangled from the tons of rubble and getting them extricated." He said the search was focused primarily on the front and rear of the building, but that teams "are going to search until we get to the basement."
Roofers Patrick Glynn and Anthony Soli were working atop a nearby building when they heard what sounded like two loud bangs or explosions. They immediately ran down the scaffolding and helped pull out two women and a man.
Glynn said he had been watching workers take down the doomed building over the past few weeks, and said he suspected a collapse was inevitable because of the methods the workers were using to tear it down.
"For weeks they've been standing on the edge, knocking bricks off," he said. "You could just see it was ready to go at any time. I knew it was going to happen," Glynn said.
Written By: Donna Leinwand Leger and Doug Stanglin, USA Today