Saint John Fire crews responding to the fire at Crowe's Auto Body on Grandview Avenue.
Platoon chief Eric Garland tells us no one was in the garage at the time or in the nearby house.
He tells crews took an aggressive exterior attack because no one was inside the building not wanting to take a chance on what hazardous materials might be inside.
Garland says they did have concerns about propane tanks in the building but its unclear what caused an explosion but he does not think it was the acetylene.
A fire investigator is looking into the cause.
