For the second time in less than a month, a building has collapsed in Philadelphia, this one leaving an estimated eight people injured, including a baby.

The collapse happened this morning when witnesses told KYW that they smelled gas and then heard an explosion. The building to collapse was a row home on Philadelphia's South Side and reports say it appears there are two other row homes that are partially collapsed.

Witnesses say the baby was injured by flying glass and that firefighters had to hose down other victims who had burn injuries.  All victims have been transported to hospitals near the city and gas service has been shut down in and around the surrounding area.

The first building collapse in Philadelphia happened about a month ago when a four story  wall of a vacant building collapsed onto an adjacent Salvation Army thrift store, killing six people and injuring 13. Crane operator Sean Benschop was charged with involuntary manslaughter and other related charges.