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MIAMI (CBSMiami/AP) — A Florida Atlantic University student is facing charges that he threatened to kill a professor for scheduling a final exam at 7 a.m.

FAU police arrested 20-year-old Rafael Decomas last week, saying he posted on Twitter that he was angry about the early morning test.

Police said Decomas wrote, “this is my message to premeditated murder.”

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Police said Decomas admitted writing the post but told officers it was out of frustration and he never intended to hurt anyone.

Decomas is charged with sending a written threat to kill or injure. He has been released on bail.

Florida Atlantic is 16 miles from Marjory Stoneman Douglas High School, where a gunman killed 17 in February.

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(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)