Two custodians were found shot to death Monday inside a Chicago elementary school after one of them allegedly killed his co-worker before turning the weapon on himself, according to reports.

A 48-year-old woman and a 63-year-old man were found unresponsive inside Mark Twain Elementary School just after 3:30 p.m., the Chicago Police Department said.

Both were shot once in the head, authorities said. They were taken to local hospitals, where they were pronounced dead.

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An unspecified weapon was found at the scene.

School principal Matthew Moline confirmed the deaths in a…

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