Police say a man started picking fights with fellow subway commuters and then punched and choked one of them.
A 32-year-old man was on a southbound A train last Friday in Brooklyn when the man sitting next to him became belligerent and started arguing with him.
The man then got into an argument with another commuter, and when the first commuter tried to intervene, the man attacked.
He punched and choked the victim as the train rode down the tracks towards High Street, according to police.
When the train got to High Street and the doors opened, the suspect took off.
Police ask anyone with information to call Crime Stoppers at 800-577-TIPS.