The NYPD said Monday that it plans to arrest nine members of the alt-right group the Proud Boys and three more anti-fascist opponents involved in a brawl on the Upper East Side on Friday — as new video of the melee surfaced.

“We believe we have valid [reason for the] arrests for those nine individuals to include charges of riot and attempted assault,” NYPD Chief of Detectives Dermot Shea said at a press conference, adding that the raps could be upgraded.

Immediately after the fight, the NYPD arrested three protesters who punched a member of the conservative group and stole a backpack.

The NYPD was quickly criticized for not arresting any members of the alt-right group, which has been branded a hate group.

Shea said Monday that three more protesters were to be arrested for the brawl, too.

Meanwhile, police Monday released new video from the fight Friday night on East 82nd Street after Proud Boys founder Gavin McInnis gave a speech at the Metropolitan Republican Club. The video shows one of the protesters tossing something at Proud Boys members, who then whale on them, kicking and punching them and calling them “f—-ts.”

The club on East 83rd Street was vandalized in the hours leading up to the speech and brawl.

“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,” Shea said.