CHICAGO -- Over 100 students and staff members at an elementary school on the South Side were taken to hospitals as a precaution after high carbon monoxide levels were detected.
New detectors were tripped around 8 a.m. Thursday at the Horace Mann school, located at 8050 S. Chappel Ave.
The Chicago Fire Department responded to the hazardous materials call. Chicago Public Schools officials say they evacuated students.
104 kids and seven staff members were taken to area hospitals for evaluation as a precaution. All were listed in 'very good condition.'
Staff members moved the remaining students into an annex building for the rest of the school day.
In late October, there was a similar incident at Prussing Elementary in Jefferson Park. Nearly 80 students and teachers got sick after a carbon monoxide leak.
After that, CPS installed nearly 6,000 brand new carbon monoxide detectors in schools across the district.
People's Gas was on site today investigating but the exact cause of the leak has not been determined.