A 33-year-old man was slashed and stabbed on the M train in Brooklyn.
It happened Tuesday night on Myrtle Avenue and Broadway.
Police say the victim and suspect were involved in an argument on the train when the suspect slashed the man's hand and stabbed him in the neck.
The victim was able to leave the station and walk himself to the hospital.
Police say they have arrested a 27-year-old man in connection to the incident.