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Omar Mateen terrorized his Florida grade school by threatening to go on a shooting spree; multiple former classmates told TMZ.

The celebrity news site spoke with Mateen’s 5th-grade classmate Leslie Hall. She said Mateen told a group of kids at Mariposa Elementary he was going to bring a gun to school and kill everyone.

Hall said the statement was not received as a joke. The kids immediately told a teacher, and Mateen was suspended for two weeks.

Hall doesn’t recall exactly what prompted the threat. But does remember her mom having multiple meetings with the school faculty about Mateen’s constant bullying of her and other students.

Hall also remembers Mateen shocked high school classmates on 9/11 by bragging that Osama bin Laden was his uncle.

TMZ reached out to the school district. They did not want to comment.