BREAKING: Building Collapses in Center City, People Trapped - PHILADELPHIA

PHILADELPHIA (CBS) -- A building collapse in Center City has trapped several people.
The collapse happened at a building at 22nd and Market Street in Center City.
Chopper 3 HD was over the scene where rescue crews, including firefighters, were assisting people who were trapped under the rubble.
It was not immediately known if anyone was seriously injured.

The building was reportedly being demolished at the time of the collapse