Three children and three adults were hospitalized early Friday after carbon monoxide was detected inside a home in Back of the Yards on the South Side.
Chicago fire officials found dangerous levels of carbon monoxide after conducting a check about 3 a.m. in the 4900 block of South Seeley Avenue, Chicago police said.
Three children and three adults were sent to Holy Cross Hospital as a precaution and were reported in good condition, officials said.
Fire officials secured a gas line until the investigation was complete.