The New York Police Department (NYPD) said Monday that it believes it can bring charges against nine members of the right-wing "Proud Boys" group involved in last week's violent clashes in Manhattan.

“We have … nine individuals that we feel confident we can sustain charges of riot or attempted assault," NYPD Chief of Detectives Dermot Shea said at a news conference Monday.

Full remarks from @NYPDDetectives, Chief Shea on the incidents from this Thursday and Friday night in the Upper East Side of #Manhattan. We need your help identifying the individuals involved please contact @NYPDTips 800-577-TIPS pic.twitter.com/lbSGwpz3Uo — NYPD NEWS (@NYPDnews) October 15, 2018

Police on Friday arrested three men — Kai Russo, Caleb Perkins and Finbarr Slonim — after a speech from "Proud Boys" founder and Vice Media co-founder Gavin McInnes at the Metropolitan Republican Club. McInnes left Vice in 2008.

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Those three men were protesting McInnes's speech, according to media reports, and Shea said Monday that police are also looking to arrest three more protesters.

The NYPD had been criticized before Monday for arresting protesters but not any members of the far-right group.

“By the end of the night, no Proud Boys were arrested, and several anti-fascist protesters were hauled away in handcuffs. Infuriating? Yes. Surprising? No," the NYC Metropolitan Anarchist Coordinating Council said in a statement.

The NYPD on Monday also published a tweet with video from the clashes, which occurred on Manhattan's Upper East Side, showing "Proud Boys" brawling with the protesters.

On Friday at approx 8:23 pm there was an altercation which was widely distributed via social media on 82nd between Lexington to Park, here’s another angle of the video. We need your help identifying these individuals please contact @NYPDTips 800-577-TIPSpic.twitter.com/ndII6m0aLc — NYPD NEWS (@NYPDnews) October 15, 2018

Shea said Monday that the NYPD "will not tolerate any violence on the streets of New York City."

“We will not tolerate any violence on the streets of New York City, and anyone, from any group, who participates in violence will be vigorously investigated," he said.