BROOKLYN - Police are looking for a man accused of groping a 22-year-old woman on the J train in Brooklyn. 

It happened Sunday around 3:30 p.m. inside the Norwood Avenue J subway station. 

Police say the suspect approached her from behind and grabbed her rear before running away.

He is described as being between 18 to 21 years old, 5'6'' to 5'8'' tall and weighing 160 pounds.

Police say the suspect has an orange afro and was last seen wearing navy blue pants.

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