‘Device’ found at Chicago elementary school with hole in roof

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CHICAGO -- A Southwest Side middle school was evacuated Wednesday after officials discover damage from a possible explosion.

Chicago police are looking for the person responsible for the damage to the roof of the Columbia Explorers Academy near 46th and Kedzie in the city’s Brighton Park neighborhood.

Neighbors told WGN News that they heard a loud blast at about 10 p.m. last night.  The damage was discovered today.

A source with knowledge of the investigation says a fire cracker exploded on the roof.

About 200 7th and 8th graders attend classes in the high school prep center.  They were all evacuated to the next-door building when school officials discovered the damage.

No one was injured.

The Chicago Police Bomb and Arson unit and the ATF are both investigating.