A man from Charlotte, North Carolina has been arrested for threatening on Twitter to assassinate President Barack Obama during the Democratic National Convention.

Police arrested 21-year-old Donte Jarmar Sims on Wednesday. He has been charged with threatening the president’s life.

"Well Ima Assassinate president Obama this evening !... Gotta get this monkey off my chest while he's in town," he tweeted on Monday.

“The Secret Service is gonna be defenseless once I aim the Assault Rifle at Barack’s forehead... F* the #DNC,” he added.

Sims told investigators that he hated the President and was high on marijuana when he made the threats. He acknowledged what he did was wrong and has provided police with a written apology. Sims is currently being held at a federal detention center.

He faces up to five years in prison and a $250,000 fine if convicted. Sims has previously been charged with drug-related offenses.