Outraged protesters will rally Monday at Boston City Hall after a YouTube video showed a police officer choking a young man during a recent arrest.

The video, published on Aug. 23, starts with a man, later identified as 18-year-old Elvin Vargas, being led to a police cruiser.

As he is being put into the car, he begins lashing out at police and screams, "f--k the police!" At that point, an unidentified officer puts two hands around the handcuffed man's neck and chokes him.

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A crowd gathers and onlookers desperately try to calm things down.

One witness repeatedly yells, "Somebody's going to get shot!" As the crowd disperses, an officer approaches bystanders with a baton. A man is heard saying, "Are you going to touch me with [the baton]?" and the officer replies, "I will."

"That's police harassment," the bystander yells.

The incident, which reportedly happened on Aug. 16 and was reported by The Boston Globe, has prompted plans for a rally that is set to go off at Boston City Hall Monday night. 

Boston Police Commissioner Evans denied any wrongdoing by the police officer, the Globe reported.

The video can be seen above.