Police are searching for a suspect who stabbed a woman on the No. 3 train Friday night. 

Officers say a 23-year-old woman was riding the train as it entered Nostrand Avenue.

As the doors opened, police say a man slashed her in the face and arm with a knife or some kind of sharp weapon.

The suspect ran away and the victim was taken to the hospital. 

Police say the suspect is about 5 feet, 11 inches tall and weighs around 170 pounds.