On Sunday, hundreds of counter protesters — including dozens of black-clad antifa — filled Martin Luther King Jr. Civic Park in downtown Berkeley. They were there to protest a weekend of right-wing rallies — in particular, one organized by Patriot Prayer, a small right wing group headed by 33-year-old Joey Gibson.

As it turned out, the rallies had actually been canceled by their organizers before the weekend even began. But local left wing activists showed up anyway.

At first, police prevented anyone wearing masks from entering the park, detaining anyone who covered their face. But the law enforcement presence was inconsistent, and a group of masked protesters were able to climb over the barricade and enter the park.

Not long after, Gibson showed up, along with a few other members of Patriot Prayer, and walked right into a crowd of masked protesters where an argument broke out.