A roof partially collapsed and explosions could be heard inside a Folcroft, Pennsylvania warehouse as a three-alarm fire tore through the building Thursday night.
The fire started around 7:30 p.m. in the depot located along the 1000 block of Henderson Boulevard, fire officials said.
Officials believe oxygen containers are exploding from the intense heat inside the building. Firefighters have been unable to enter because of the danger.
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It was nearly three hours before firefighters were able to bring the fire under control, officials said.
There are no reports of injuries. Officials have called in hazmat crews to assist.