Rescue workers were dispatched at 10:43 a.m. Wednesday to 2140 Market Street where a 4-story building being demolished collapsed onto the two-story Salvation Army Thrift Store, located next door.
The collapse brought down part of the thrift store and what appears to be converted row homes attached to the back of the building.
Bystanders immediately jumped into action, helping first responders to locate and assist the wounded.
Two people remain trapped under the rubble. Philadelphia Fire Commissioner Lloyd Ayers says 12 people have been taken to area hospitals for treatment of minor injuries.
Emergency crews are on the scene continuing to work feverishly to find survivors.
It appears the building at 2136 Market Street, located next to where the collapse happened, was being demolished. However, there is no word if work there had any role in the incident.
Stay with Action News and 6abc.com as more information becomes available.