Police say the man used a razor blade to slash a 19-year-old woman in the face Friday afternoon on the westbound BX4 bus after the two got into a dispute over personal space near Westchester Avenue and Pugsley Street.
The victim was taken to Jacobi Hospital in serious condition.
The suspect is described as a black man between the ages of 25-30, 5'10" with a medium complexion, weighing 160 pounds. He was last seen wearing a black du-rag and a black hooded jacket.