Berkeley, CA – Masked antifa rioters used hammers to smash the windows of a U.S. Marine Corps recruiting office on Sunday afternoon, threw explosives at police, and torched city vehicles (video below).

Plans for antifa demonstrators to disrupt a “No to Marxism” rally at Berkeley’s Civic Center Park on Sunday began as soon as the announcement was made that Patriot Prayer and Proud Boys groups planned to gather, FOX News reported.

A counter-rally they called a “Sweep Out The Fascists” march recruited hundreds of battle-dressed, violent rioters to show up to disrupt the planned conservative event.

City officials said neither rally had requested a permit for their planned activities, FOX News reported.

“No police were around as the black bloc traveled down the street, and a handful used hammers to smash the windows of Shattuck Ave US Marine Corps Recruiting office,” filmmaker Ford Fischer wrote in a tweet.

Ford captured the attack on the military recruiting office on camera, but when antifa rioters noticed him, he was the next to be threatened.

“After I filmed the antifa break the Marine Corps office window and throw a torch into a dumpster, one of them called a few over to confront me. They basically told me to leave, implying attack if I didn’t. I left,” Ford tweeted.

“’Get the f— back. Cops aren’t here. They won’t help you,’” antifa told Fischer when they observed him filming them.

But the police were on hand to break up some of the violence, and officers arrested at least 20 rioters and confiscated “dozens of weapons,” FOX News reported.

Authorities said three people suffered minor injuries after “extremists” tossed explosive devices at Berkeley police and Alameda County sheriff’s deputies, according to FOX News. No officers or deputies were injured.

Police said antifa damaged 21 city vehicles by setting them on fire and slashing their tires. Fires were also set in trash cans along the protest route, FOX News reported.

Berkeley’s riot on Sunday came a day after antifa rioted at a planned, permitted conservative rally in Portland, Oregon.

Portland police ordered the violent crowd to disperse, and deployed “stun grenades” to push the group back, according to Fox News.

A couple of rioters were injured, and Portland Police Chief Danielle Outlaw on Sunday ordered a review of the officers’ use of force during the event, FOX News reported.

You can see antifa smash the windows of a U.S. Marine Corps recruiting office in the video below: