Federal authorities are assisting with the investigation into an extra-alarm fire that left two firefighters hurt Saturday night in the Southwest Side Brighton Park neighborhood and was deemed suspicious by the Chicago Fire Department.
Firefighters were called about 8 p.m. to the blaze at the four-story mattress warehouse near the intersection of 48th Place and Christiana Avenue, fire officials said.
It was upgraded to a second alarm about 8:30 p.m. and a third at 9:15 p.m. before being put out at 10:45 p.m.
Two firefighters suffered minor injuries. One was sent to Advocate Christ Medical Center in Oak Lawn and the other to Holy Cross Hospital, officials said.
Chicago Fire Media tweeted Sunday afternoon that the blaze was “found to be incendiary and suspicious in nature,” and the investigation has been turned over to the CPD Bomb and Arson Section.
The Federal Bureau of Alcohol, Tobacco, Firearms and Explosives is also investigating, ATF spokesman Tom Ahern said Sunday afternoon.
2-11 on Christiana & 48pl. 4 story 150x150 building. All companies working.
— Chicago Fire Media (@CFDMedia) May 1, 2016
