Women using Islington subway station are being urged to be careful.

Toronto Police have released a security image of a man who is sought for allegedly sexually assaulting a woman at the busy subway station, at Bloor St. W., and Islington Ave.

Police say they are hoping someone will recognize the suspect and contact them immediately.

Police say the suspect is sought for sexually assaulting the female around  6:20 p.m. on November 9 as she was travelling on an escalator in the subway station.

“While on the escalator she was approached from behind by an unknown man,” detectives from 11 Division said in a press release on November 18. “He sexually assaulted her and fled from the subway station and was last seen going east.”

Officers said they have been carrying out ‘extensive inquiries’ to identify the man without luck. They have released an image in the hope that someone recognizes him.

He is described as between the ages of 25 to 30, about 5-feet 7-inches to 5-feet 9-inches tall, with a dark complexion, frizzy hair tied in a bun and wearing a blue surgical mask.

Police said he was last seen wearing black shoes, tan coloured pants, a grey t-shirt, black zip-up hoodie, and a black backpack.

Officer warn that a sexual assault is any form of unwanted sexual contact. It includes, but is not limited to, kissing, grabbing, oral sex and penetration.

Anyone with information is asked to contact police at 416-808-1100, Crime Stoppers anonymously at 416-222-TIPS (8477), online at www.222tips.com, text TOR and your message to CRIMES (274637), or Leave A Tip on Facebook.

Download a free Crime Stoppers Mobile App on iTunes, Google Play or Blackberry App World.