A Brooklyn resident was arrested during a violent clash that occurred after a speech by the founder of a far-right group.
Kai Russo, 20, was among three people handcuffed outside of the Metropolitan Republican Club after a speech made by the founder of the male-only "Proud Boys" group, Gavin McInnes.
Russo is facing robbery and assault charges.
Police say the NYPD is reviewing YouTube video of the incident and that more arrests are possible.
Mayor Bill de Blasio tweeted about the incident, saying "Hate is never welcome in NYC and we will punish those responsible--whether they threw punches or incited violence--to the fullest extent of the law."
The Upper East Side Republican Club where McInnes spoke was vandalized before Friday's event. Photos showed windows smashed in.
The campaign for Marc Molinaro, the Republican candidate for New York governor, says vandals also spray-painted a door, put glue in a lock and left a note behind warning the damage is "just the beginning."
There is no word yet if both events are connected.