CHICAGO (CBS) — Extra police officers will be at Minooka Community High School – South Campus on Wednesday, after the school received a bomb threat overnight.

Channahon police said they learned of the threat around 4:45 a.m., and immediately swept the school at 26655 W Eames St, but found no danger.

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Additional officers will be at the school throughout the day to protect students and staff. School resource officers also will be inside the building for the entire school day.

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Channahon police also notified the Minooka Police Department and the MCHS – Central Campus about the threat.

Investigators were working with MCHS to identify and find the person who sent the threat.

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Anyone with information about the threat should call Channahon police at 815-467-2112.