Police say the incident took place on the morning of April 15, when a suspect entered a building on West 95th Street and defecated on a Pride flag.
The man is also said to have taken a second Pride flag and wiped his backside with it before running off on Amsterdam Avenue.
No one was hurt during the incident.
The suspect was last seen wearing a black hat, dark colored jacket, light colored pants, one dark colored sneaker, and one white sneaker.
The NYPD Hate Crimes Task Force is investigating the incident.
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