A man shoved an NYPD officer to the ground and tried to strangle the officer with a chain during Lower Manhattan protests on Thursday night, according to police.

The alleged attack occurred in Greenwich Village during the second consecutive night of demonstrations in the area that led to 18 arrests, police sources told Fox.

The NYPD tweeted out a photo of the chain with the message: “Violence – in any form – is unacceptable. We will be reviewing this incident, and bring any additional perpetrators to justice.”