Investigators said he tried to abduct a 16-year-old girl on Pacific Street in Stamford at 7 a.m. Sunday.
The man was driving a black station wagon. The victim was walking to work on Pacific Street.
Police said he pulled up alongside of her to ask for directions. She kept walking, but the man stopped his vehicle, got out and began following her.
She became frightened and started to run, police said. He got back in his car and followed her to 7 Market Street.
That's when he got out of the car again and, police said, grabbed her by the throat, pulled her into the station wagon and sexually assaulted her.
The victim managed to fight him off and run from the car. She called 911 for help.
She sustained bruising and abrasions to her neck and throat during the attack.
Investigators say the same man may be responsible for another attempted attack last September in the same neighborhood.
The suspect is described as a Hispanic male, possibly in his 20s with a thin build and spiky black hair. The vehicle is described only as a small dark colored car, possibly a station wagon.
Police released a sketch of the suspect.
The Stamford Police Department Special Investigations Juvenile Unit is investigating this incident and is seeking the publics assistance. Anyone who has any information regarding either of these incidents is urged to call 203-977-4639. All calls will be confidential.