The air is beginning to clear again after 150 University of Chicago students were evacuated from their dormitory after high levels of carbon monoxide, about 400 parts per million, were detected in the basement earlier this afternoon. more ›

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Several people, including children, were hospitalized overnight after they were sickened by carbon monoxide as a result of a gas leak at 1926 N. Keystone Ave. in Humboldt Park. Five ambulances responded to the call shortly after 9 p.m. While police reported that nine people were hospitalized, the Fire Department said only seven were.

Police said nine people were sickened, including four children and two teenagers. Four people -- 15-months, 8, 11, and 20 -- were taken to Our Lady of the Resurrection, three people -- 16, 17, and 32 -- went to Saints Mary and Elizabeth Medical Center and an 8-year-old and another person whose age was unknown were taken to Norwegian-American, according to a Grand Central District sergeant, who was citing preliminary information.

Officials say a gas leak at 3430 W. Shakespeare Ave. prompted evacuations of homes surrounding the address, according to CBS2. There's been no update on the situation since 2 p.m. more ›