No injuries were reported, but the cause of a big fire on Chicago's north side remains under investigation.
Thick black smoke could be seen for miles as it poured from the upper stories of a high-rise in the 5900 block of North Sheridan.
Numerous ambulances and fire trucks responded to the building, at 5901 N. Sheridan Rd., at about 1:15 p.m.
All apartments and stairwells of the 16-story building were searched by fire crews without anyone being found and without any injuries reported.
A roofing company which was reportedly working on the roof has representatives on the scene, but the cause of the fire is not known.