Tim Olk submitted some images from the 2-11 Alarm fire Friday night at 69th and Clyde in Chicago.

heavy fire blows out from building

Firefighters in the alley as heavy fire vents from the top floor of the building. Tim Olk photo

2-11 Alarm fire in Chicago 12-23-12

Fire was concentrated in the rear of the three-story building. Tim Olk photo

apartment building on fire in Chicago at night

Another image showing heavy fire at the 2-11 Alarm fire 12-23-12 at 69th & Clyde in Chicago. Tim Olk photo

Chicago Fire Department engine working at fire scene

Engine 126 working at the scene. Tim Olk photo

Chicago Fire Department OFI

The front courtyard area of the building. TIm Olk photo

firefighters working at fire scene in Chicago

Firefighters work to put another line into operation in the alley Tim Olk photo