A musician at the Metropolitan Opera House in Manhattan found a noose in the men’s locker room Saturday night — and cops are investigating it as a possible hate crime, sources told The Post.

The Metropolitan Opera said the noose was found by a percussionist at 30 Lincoln Center Plaza just after 7 p.m. prior to the start of Turandot.

“We immediately called the NYPD, who began their investigation with the Met’s full support and cooperation,” the statement reads.

“This is a very disturbing incident for the members of our company and, if it was a deliberate act of racial hate, we would like to find out as soon as possible to help guide our next steps.”

It is unclear who the noose was targeting. The musician who found it is white, but sources said it was being probed as an “anti-black hate crime.”

Local 802 American Federal of Musicians released a statement saying they were working with the NYPD.

“We are saddened and sickened by this display of hate and are working with the Metropolitan Opera and NYPD to take immediate steps to investigate,” union president Tino Gagliardi said. “We must ensure that these abhorrent acts are not tolerated and that appropriate actions are taken. Musicians come to New York to perform with the most talented artists and be part of the most creative artistic community in the world. Our inclusiveness is our most vital value, and these types of heinous, discriminatory, and racist actions have no place among us or in our society.”