A band of thugs slashed a 19-year-old man multiple times on the Upper West Side early Saturday, police said.

The teenager was walking on the pedestrian walkway outside of the West 96th Street train station on the 1, 2, and 3 line near Broadway when a group of four men knifed him at around 12:25 a.m., cops said.

He suffered slash wounds to the top of his head, hands and back and was taken to St. Lukes Hospital, where he was listed in stable condition.

A witness said a fight broke out before the attack. No arrests have been made.

Additional reporting by Gabrielle Fonrouge.