BOSTON —Transit police are asking for the public’s help to identify a man accused of indecently assaulting a woman who was on a Green Line trolley Wednesday.

The victim said she was assaulted at about 8:50 a.m. as she rode the trolley from Government Center Station to Park Street Station.

The assailant is described as a white man who is about 40 to 50 years old. He was wearing a red knit winter hat, red jacket, jeans and dark gloves.

Anyone with information is urged to call police at 617-222-1050.