A ski mask-wearing brute robbed an off-duty NYPD cop at knifepoint in Brooklyn early Thursday, cops and sources said. 

A person in a ski mask and hoodie holding a crowbar, captured on surveillance camera at night.The mugger grabbed the victim’s car keys, wallet, and phone before he took off. AntonioDiaz – stock.adobe.com

Two NYPD officers in uniform facing away from the camera in a snowy New York City street.An off-duty NYPD cop was robbed at knifepoint at Metropolitan Avenue and Leonard Street in Williamsburg on Thursday at approximately 2:20 a.m. Rush – stock.adobe.com

The mugger — also seen wearing all black — stormed up to the 31-year-old victim around 2:20 a.m. at Metropolitan Avenue and Leonard Street in Williamsburg while displaying a knife, police said. 

He grabbed the victim’s car keys, wallet and phone on the mixed residential and commercial block before taking off, cops said.

He had not been arrested hours later.  

The victim, who sources described as an off-duty officer, was not hurt, authorities said.