Four people were hurt, one seriously, when a propane tank exploded and started a fire that destroyed a truck maintenance garage for Turano Baking Co. in Oak Park, IL, Nov. 11, officials told the Chicago Tribune.

The explosion occurred around 2:15 p.m. as workers were changing a propane tank in a truck, Oak Park fire Battalion Chief Keven Wiley said. The workers thought the tank was empty, but it was full and shot into the air, causing the brick walls of the structure to collapse, Wiley said.