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BERKELEY — A pro-Trump rally in downtown Berkeley on Saturday afternoon was marked by violence:

6 p.m.: Berkeley police say seven people were evaluated for medical injuries, but none needed nor wanted to go to the hospital. A total of 10 people were arrested, including five for battery, four for assault with a deadly weapon (including one with possession of a dagger) and one for resisting arrest. Police reported items confiscated among the combatants were: “metal pipes, bats, 2x4s and pieces of wood. A group with bricks was detained, and their bricks confiscated.”

5:15 p.m.: Three more people have been arrested, two men and a woman who were anti-Trump protesters, but police did not release any other details. The crowd has dwindled to about 50 people, and Rich Black, a pro-Trump rally organizer, tweeted to followers “To those still in attendance at the March please disperse and leave. The Police betrayed us.”

#BPD arrested one woman up on Center and Milvia. Unclear the reason. pic.twitter.com/TIeZPKKSp6 — Aaron Davis (@BaronBavis) March 5, 2017

4:30 p.m.: Crowd thinning out to about 100. Police said there are multiple victims of assault, but didn’t give a number or the magnitude of their injuries. Some anti-Trump protesters are throwing things at Trump supporters, apparently trying to provoke other side. Berkeley police are making occasional forays into the crowd, but mostly holding back. Police also issued an alert that false information had been posted on social media that someone at the demonstration had died as a result of stab wounds.

4 p.m.: After marching about six blocks through downtown Berkeley, protesters from both sides came back to the civic center park, where police moved in and arrested a Trump supporter. No information available on why the man, wearing a helmet, was arrested. Fights still going on between both sides. The crowd is mostly anti-Trump.

3:30 p.m.: Protesters have spilled out into Martin Luther King Junior Way and are fighting in the middle of the street, and there are people punching each other on the sidewalks. Pro-Trump marchers are on the move, leaving Martin Luther King Jr. Civic Center Park. and moving up Allston Way, passing Shattuck Avenue. Some people have bloody faces and are shouting at each other.

There were punches thrown during the first melee, about 2 p.m., between a few dozen people. It wasn’t clear who threw the first punch and police, who were on hand in riot gear, didn’t intervene.

There's a moving blob of fistfights here. Saw an American Flag on a pole swinging around at #march4trump in #berkeley pic.twitter.com/jLMzgjU9aQ — Aaron Davis (@BaronBavis) March 4, 2017

Another broke out a half-hour later, and several smaller incidents followed as a people shouted and waved flags in a large moving circle in the civic center.

One pro-Trump supporter was apparently sprayed in the face with Mace, just before 3 p.m. Blood was coming from his nose and friends were cleaning his eyes with a T-shirt. No other injuries have been reported.

Eva Peters, a mother of four from Danville and a Trump supporter, complained about a lack of police response to the fights breaking out. “I don’t think they did anything but they’re damned if they do damned if they don’t,” she said. “These people are violent,” she said, referring to the anti-Trump contingent. She carried a can of pepper spray and held a sign saying “Trump saving USA.”

At one point, a smoke bomb was thrown, spreading a smelly blue cloud that scattered the crowd.

As of 3 p.m., there were about 200 gathered at Martin Luther King Jr. Civic Center Park, most of them anti-Trump protesters.

Many of the Trump supporters, some wearing kilts, were carrying wooden shields with a ‘V’ on them.

Another group with pink masks carried shields with three arrows on them, calling themselves the “Pastel Bloc,” and said they were there to counter the idea that masked protesters are all violent.

#pastelbloc guy – "we are showing that it's worth coming out and you can hide your face and look cute doing it." #March4Trump in #berkeley — Aaron Davis (@BaronBavis) March 4, 2017

Daniel Meiers said he came from Sacramento to defend the president against critics. “They want to justify political violence against people, saying when anyone disagrees they are a Nazi,” he said, referring to the anti-Trump protesters.

The pro-Trump “March on Berkeley” rally is one of a number of events across the nation on Saturday, including at the Washington Monument, Trump Tower in New York and dozens of other locations.

Strong language thrown around at #March4Trump in #berkeley – Jim Templeton of San Francisco, self-described "Europhile" in red Trump hat. pic.twitter.com/cGhJLMoa0m — Aaron Davis (@BaronBavis) March 4, 2017

Prior to the Berkeley event, both protesters and counter-protesters were wary of how the event would go. On Mar. 1, the website It’s Going Down, posted that “The feeling across organized circles is that this is, on some level, a trap.”

The demonstrations are also intended to show unity in the face of what organizers call “a seditious fringe” aiming to sabotage Trump’s vision for the country.

The concerns point to the violent protest that broke out in the midst of a planned visit from Breitbart News editor Milo Yiannopolous to UC Berkeley. The Feb. 1 speaking engagement was cancelled by authorities after a group of about 100 to 150 masked people threw rocks, broke windows and set fires outside the university’s student union building.

The event’s organizer, Rich Black, retweeted a confirmation from a group named “The Proud Boys” that Saturday’s march will still go on, despite fears of counter-protests and violence.

“We are to arrive at Berkeley in the name of peace and in hopes to show the world that freedom is a fire that refuses to be extinguished,” Black tweeted.

Tito Mena, a Trump supporter traveled from Stockton for rally, and said he had moved from Tijuana three months ago. Mena said he was born in San Diego but had to move to Tijuana when his parents were deported. Now 20 years old, Mena said he supports the border wall proposed by Trump, saying it would keep out drug cartels.

“I don’t believe one random guy crossing the border is a problem. It is the cartels are taking advantage of the open border,” Mena said.

The marches coincide with over 50 rallies organized by the conservative group, the Main Street Patriots. The rallies have been scheduled in cities from San Diego to Birmingham, Alabama.

The marches are dubbed the “Spirit of America” rallies and are in support of President Trump and “his effort to put America First” according to the Main Street Patriots website.

Groups of hundreds of people turned out Saturday in places from Colorado’s state Capitol to near Trump’s Mar-a-Lago estate in Florida for Saturday’s “March 4 Trump” demonstrations. Sometimes, they clashed verbally with generally smaller groups of counter protesters.

At Trump Tower, a couple hundred supporters gathered and chanted “U-S-A” and held signs with messages such as: “Yes he is our president.”

Some minor scuffles between dueling demonstrators at the Minnesota State Capitol were quickly defused by other protesters and police. Near Mar-a-Lago, the Palm Beach Post reported that people on both sides exchanged profanity.

Trump’s motorcade briefly stopped so he could wave at supporters.

Correction: An earlier version of this story referred to the Pastel Bloc as countering the Black Bloc’s violence. A more accurate characterization would be that they are countering the notion that masked protesters are all violent.