The site of a proposed police training facility in Atlanta was attacked Sunday by “violent agitators” during a coordinated, chaotic attack, police said.

The future police training site has been the focus of repeated protests and confrontations, but Sunday’s attack threatened the lives of law enforcement personnel.

A “Stop Cop City” festival was underway nearby to protest the facility’s construction when police said more than 100 people, who used the peaceful protest as a cover, broke away and started a violent, coordinated attack on police personnel and construction equipment at the construction site of a proposed police training center.

A new video from police cameras showed fireworks exploding just inches away from officers trying to lock down the training center.

“They changed into black clothing, entered the construction area, and began throwing large rocks, bricks, Molotov cocktails and fireworks at police officers,” the Atlanta Police Department said.