Philadelphia's mayor says the collapse of a downtown building that was being demolished has killed six people.
Mayor Michael Nutter discussed the accident and the search and rescue attempts Wednesday night.
Fire officials earlier had reported one woman was killed and 13 people were injured in the accident. But body bags were removed from the rubble hours later.
The four-story building collapsed Wednesday morning.
Several witnesses said they had been casting a wary eye on the demolition site and questioned how the workers were tackling the job. They say they heard a loud rumbling sound immediately before the collapse.
The building once housed a first-floor sandwich shop and apartments above. Its collapse sent debris onto a Salvation Army corner thrift store next door. The two properties are adjacent to an adult bookstore and theater that had been taken down earlier.
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