Excerpts from abc7chicago.com:

A Chicago firefighter was critically injured in a blaze at a West Side apartment on Sunday afternoon. The fire broke out at a building in the 1200 block of North Lavergne Avenue.

A firefighter in his 30s,was transported to West Suburban Medical Center in serious condition. He was taken to Loyola Medical for further treatment, where he is listed in critical condition.

A mayday call was issued as a precaution. Officials did not elaborate on the firefighter’s injuries and did not immediately provide further information.