Three dozen people were injured Sunday in a three-alarm fire at a Bronx building.Fire officials say 26 civilians were hurt in the blaze at 1749 Grand Concourse. The fire department says at least four people were critically injured and taken to Bronx Lebanon Hospital. They say 10 firefighters were also taken to local hospitals with minor injuries.Officials say the fire started on the first floor of the building, but don't know yet what caused the blaze. Fire officials say they did not have to evacuate the entire building.