Protesters gathered in McKinney, Texas, on Monday night, three days after a white police officer responding to reports of a disturbance at a pool party was seen acting aggressively toward black teenagers, throwing a bikini-clad girl to the ground and pulling his gun on two others.

The officer, was placed on administrative leave as a video of the incident sparked outrage on social media.

Carrying signs that read "Black Lives Matter" and chanting "All lives matter," demonstrators called for the officer to be fired, Yahoo News reports.