Emergency personnel stand in front of a collapsed building structure in Philadelphia, Pennsylvania on June 5, 2013.
An industrial building has collapsed in the US city of Philadelphia, with reports of up to 10 people trapped in the rubble.
The four-story building fell in the heart of Center City in downtown Philadelphia on Wednesday, injuring 10 people with at least another 10 more trapped in the rubble.
The collapse also brought down a portion of a store and homes which were attached to the back of the building.
Authorities failed to provide a reason for the collapse, though news reports said that a part of the building and an adjacent structure were being demolished at the time.
Emergency response members have been dispatched to the scene and are working to find survivors.
The United States has witnessed a series of accidents involving infrastructure including a highway bridge that collapsed in the state of Missouri on May 25 and a bridge collapse in northwestern Washington State on May 23.
The incidents prompted several questions about the safety of the US infrastructure and the interruption of the key route between the major US cities and Canada.
GMA /KA
This article originally appeared on: Press TV