Police are looking for a person who is accused of robbing a 15-year-old boy with a machete on the subway in Longwood.

It happened at 11:18 p.m. Sunday while on the northbound 2 train near Westchester and Intervale avenues.

Police say a person approached the victim, opened his book bag, showed him a machete and took the victim's sneakers.

They say a 25-year-old man tried to assist the victim, but the suspect punched him in the face. The suspect then ran away.

The theft victim was not injured. The 25-year-old sustained minor injuries and refused medical attention.

The suspect is described as a man with a light complexion, between the ages of 17 and 20. He has a heavy build, short black braided hair and brown eyes.

He was last seen wearing a black jacket and gray sweatpants. He was also carrying a black book bag.

Anyone with information regarding this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS.