Propane tank causes North Side fire

August 7, 2009 5:31:03 AM PDT
An exploding propane tank is to blame for igniting a fire on the roof of a North Side building.Firefighters arrived on the scene at Irving Park Road and Lake Shore Drive just before 11:30 a.m. Thursday.

Crews had the flames out within 20 minutes, and no one living in the residential building was hurt. Investigators are looking into why the propane tank was on the roof and what caused it to explode.