NEW YORK (CBSNewYork) - A disturbing knife fight was caught on video in the subway system.

It happened Monday at 6 a.m. at the 125th Street 2, 3 station in Harlem.

According to police, it started as an argument between the suspect and a 51-year-old man. Surveillance video shows the suspect pull out two metal objects. The 51-year-old can also be seen holding two knives. The men then square off and start swinging at one another.

Ultimately the suspect and the 51-year-old can be seen on video grappling. The suspect can be slamming the 51-year-old into the wall and taking him to the ground. That's when, the suspect got ahold of one of the knives and stabbed the 51-year-old repeatedly in the back.

The suspect ran off. The victim was taken to the hospital in stable condition.

Anyone with any information is asked to call the NYPD's Crime Stoppers hotline at 1-800-577-TIPS (8477), or for Spanish, 1-888-57-PISTA (74782). You can also submit a tip via their website or via DM on Twitter, @NYPDTips. All calls are kept confidential.