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UPDATE: Police on Friday released new surveillance images of the man accused of attacking the subway conductor.

Original story:

CYPRESS HILLS, Brooklyn — Police launched an investigation after a train conductor was slashed in the face aboard a Brooklyn subway late Wednesday night, the NYPD said.

Authorities said it happened just before 11:30 p.m. on a southbound J train in the Cypress Hills neighborhood.

An unidentified attacker slashed a 52-year-old man on the left side of his face, police said. He was identified Thursday by TWU Local 100 as conductor Gerald Sykes.

The victim was transported to an area hospital for treatment of his injuries. TWU Local 100 said he underwent two emergency surgeries at Jamaica Hospital.

According to officials, the suspect fled the train at the Crescent Stret station to parts unknown.

Police described the man they’re looking for as middle-aged and last seen wearing a gray sweater.

Submit tips to police by calling Crime Stoppers at 1-800-577-TIPS (8477), visiting, downloading the NYPD Crime Stoppers mobile app, or texting 274637 (CRIMES) then entering TIP577. Spanish-speaking callers are asked to dial 1-888-57-PISTA (74782).

Editor’s note: The victim’s age and the location of the attack were updated after police sent out new, corrected information.