A Black Lives Matter protester broke his arm in two places after being pushed by police as he interfered with an arrest, according to the demonstrator and video from the march in Washington Heights on Saturday night.

Six Black Lives Matter protesters were detained during demonstrations in the 34th Precinct Saturday, according to NYPD spokesperson Denise Moroney. Four women and two men were arrested and released for disorderly conduct summonses, Moroney said. She did not comment on the protester who was shoved by an officer.

In a video from the scene, Keith Clingman is seen holding onto a woman who was being arrested, and falling to the street after an officer shoved him away. Clingman said he broke his arm in two places and was released from the hospital about midnight.

"The police did not try to assist me with medical care at all," Clingman wrote in an email. "Even after I told the officer who threw me that my arm was likely broken he did nothing. I asked for his badge number and he told me that he didn’t have one."

He added street medics splinted and iced his arm after he was pushed.

The NYPD spokesperson said about 50 people marched towards the George Washington Bridge in the 44th Precinct before joining another group from New Jersey, and "spilled onto the roadway blocking traffic."

Five officers sustained minor injuries, but Moroney did not specify what they were. Police did not have a report of injured protesters.

The co-founder of the Black Women's March, Kimberly Bernard, and a member of Strategy for Black Lives, which describes itself as a coalition of organizers and student activists, were arrested, according to the two groups.

Bernard—who was the woman being arrested when Clingman was shoved by police—said on social media her arrest began when an officer walked up to her and grabbed her wrist.

"We were actively retreating, taking steps backwards," Bernard, who suffered bruising and was sore on Sunday, told Gothamist in a phone interview. A space in the line of protesters facing police opened up when she was grabbed by police, she said. "He pulls me into a swarm of, I don't how many cops, too many to count."

Clingman had grabbed her by the waist while the cop who grabbed her told other officers to form a circle around her, Bernard said, adding she was grateful for him.

Bernard said she hadn't seen such escalation from officers since the first few weeks of the protests against police violence this summer during a historic curfew, sparked after the police killing of George Floyd in Minneapolis, as well as a police raid of Abolition Park during weeks of protests at City Hall calling for defunding the NYPD.

Officers in riot gear "have been following us around the city for over 100 days," she said.

"We didn't expect them to actually make arrests and be as aggressive and brutal as they were," Bernard said. "They’re very willing now to escalate and go back to the things they were doing in weeks one two and three of this movement."

Another protester—who was detained while livestreaming her arrest facedown on the ground—said six people were released with summonses in an Instagram story.

Protester Joshua Potash said arrests were made "at random" in a tweet.

"Folks were giving speeches and got attacked," he said in a tweet.

Video from Freedom News TV shows protesters blocking traffic and causing delays on the George Washington Bridge Saturday night during the march, which was co-organized by activists with BREATHE, a group pushing for police reform legislation. The group was not immediately available to comment.

Hank Newsome, the chair of Black Lives Matter's Greater NY chapter, told NBC4: "There was no hostility towards the police. The police became hostile. There were tons of police in riot gear, but there were no riots happening here."

On Sunday, an Upper East Side Black Lives Matter vigil was met with protesters demonstrating against Mayor Bill de Blasio, some carrying Trump signs, American flags, and calling for businesses to open. We'll update as more information becomes available.