Seven people are injured, including one critically, after a fire at a Bronx apartment building Sunday.The fire occurred in the Tremont section of the Bronx at 2185 Grand Concourse. Sources tell News 12 The Bronx one of the victims was critically injured after he jumped from his fifth-story window. The man is in the intensive care unit of Saint Barnabus Hospital and was facing emergency surgery.Fire officials on the scene say it appears someone started the fire on a couch in the lobby. Residents say they never heard a fire alarm and would have never known there was a fire if they didn't see the heavy smoke.