A man is accused of attempting to rape a woman he groped on the subway in Bensonhurst, police say. 

The incident began Friday after the man grabbed the woman's chest on the N train around 4 a.m., police say.

Once the train stopped at the Bay Parkway station, police say the woman attempted to get away from the man but he followed her outside, grabbing her and bringing her to the ground.

The two struggled and the suspect pinned the woman's arms and attempted to sexually assault her, police say. 

The woman screamed for help, and the man eventually ran away. 

The suspect is described as being  20 to 25 years old, 5'4" to 5'6" tall and 150 to 175 pounds.

He was last seen wearing a sweater, a white T-shirt, blue jeans and a backpack.

Anyone with information is asked to call 1-800-577-TIPS.