The incident happened just after 2 p.m.
According to a fire department spokesperson, the three victims were taken to the hospital with non-life-threatening injuries.
There was no word on what may have caused the canister to explode.
3 hurt after explosion at Chicago carnival
June 19, 2010 (CHICAGO) The 8-ounce canister was inside a hot dog stand at the carnival taking place in the Back-Of-The-Yards neighborhood.
