CHICAGO -- Firefighters put out a massive fire at a commercial building in the Bridgeport neighborhood.
It broke out just after one this morning, in a building that belongs to a plumbing company on 32nd and Shields.
The roof caved in and a wall collapsed.
Neighbors reported hearing an explosion, but investigators have not confirmed if there was one.
It took almost three hours to put the fire out.
No one was injured.
The cause is now under investigation.