Excerpts from WGNTV.com:

A Chicago firefighter was injured after falling at a house fire in the city’s South Austin neighborhood. The fire started in the back of a house on the 4800 block of West Ferdinand Street around 11:30 p.m. Tuesday.

The firefighter was on the second floor at the time of the fall, and leaned on what he thought was a wall but instead was a window. He fell two stories and was transported to Stroger Hospital with three broken ribs in his back and one in the front.

His injuries are said to be non-life-threatening.

thanks Dan