Detroit police released a sketch Tuesday of a suspect they say is responsible for three sexual assaults and one attempt this year.

The man is estimated to be between 26 and 30 years old, stands at 5-foot-6 and weighs about 150 pounds. He has a beard but no mustache and dark brown eyes.

Police say he is thought to be connected to three sexual assaults on the city's west side that took place on March 29, July 15 and Aug. 30. At least two of the women who were assaulted say they met the man through a dating site.

A fourth woman was almost assaulted on Sept. 10. The 22-year-old, whose name has not been released, had recently met the suspect. She picked him up at a gas station at 1:34 a.m.and he attacked her once inside. The woman crashed the vehicle into a parked car near Southfield Freeway Service Drive and Lyndon Street, police said, and the suspect fled on foot.

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That incident helped police link the cases.

Anyone with information about the suspect should contact the Detroit Police Department's Sex Crime Unit at 313-596-1950 or Crime Stoppers at 1-800-SPEAK UP.