CHICAGO (STMW) — Twenty people were sickened after someone began using a grill inside a North Side home on Thanksgiving night, sending seven people to area hospitals after suffering carbon monoxide poisoning.

An EMS Plan 1, which sends five ambulances to the scene, was called about 10:35 p.m. for high carbon monoxide levels in the 4300 block of West Roscoe Street, according to Fire Media Affairs.

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Twenty people were inside the home during a Thanksgiving celebration when someone used a grill inside the home, Fire Media Affairs Dir. Larry Langford said.

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Thirteen people were treated for high carbon monoxide levels, Fire Media Affairs said. Seven were transported to Our Lady of the Resurrection Medical Center and West Suburban Medical Center in Oak Park with minor injuries.

The carbon monoxide levels were normalized and the EMS Plan 1 was secured about 11 p.m.

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(Source: Sun-Times Media Wire © Chicago Sun-Times 2010. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)