October 23, 2011 (CHICAGO) --
A carbon monoxide leak on the city's Northwest Side sent four people to the hospital over the weekend. Two of the victims were critically injured.
The leak happened Saturday afternoon in a two-story building in the 2100-block of North Bingham in the Logan Square neighborhood.
Fire officials say the building had no carbon monoxide detectors.
There was no word Sunday on the source of the leak.