Police are looking for the man who partially bit another man's lip off during a fight in a Brooklyn subway station over the weekend.

According to police, the incident happened around 10 p.m. on Saturday night at the Crown Heights-Utica Avenue subway station in Crown Heights. The 37-year-old victim was punched in the head by the unknown suspect after a fight broke out between the two men. During the altercation, the suspect bit the victim on the lip and jaw, removing a piece of his lip and causing serious injury.

The victim was taken to Kings Country Hospital while the suspect fled the scene. Police describe the suspect as 35-45 years old, 5'11", 170 lbs, and bald; he was last seen wearing a blue jacket, blue jeans, a red shirt, white sneakers and he had on a black and purple backpack.

NSFW video of the fight was uploaded online then removed yesterday, but the uploader has since updated it with added footage showing what happened before the fight started. It's still unclear what caused the fight, but it gives a little more context—you can see that the argument started on the steps of the 4 trains before becoming physical. The uploader runs past other onlookers saying, "let me get a clean view," as the two begin brawling.

Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). The public can also submit their tips by logging onto the Crime Stoppers website or by texting their tips to 274637 (CRIMES) then entering TIP577. All calls are strictly confidential.