Police found the 55-year-old victim unconscious in the northbound waiting area for the C and E trains shortly before 7 p.m. Saturday.
On Sunday, police said 21-year-old Nassadir Tate of Hillside, New Jersey, was arrested on a charge of assault.
The victim was transported to Lenox Hill Hospital in critical condition, where he was later pronounced dead.
The victim's identity has not yet been released.
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