The attack happened last Friday on a northbound D train near 125th Street.
Police say the suspect got into an argument with another man.
He then took out a pair of scissors and slashed the victim in the head and arms.
The victim was treated at a hospital for his injuries.
Police have released photos of the alleged attacker.
They ask anyone with information to call Crime Stoppers at 800 577-TIPS. All calls will be kept confidential.
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