Police have developed a sketch of the suspect who sexually assaulted a woman at knifepoint Friday evening near Northgate, the first of several attacks now under investigation.

Since Friday evening, police have received four different reports of sexual assaults and attempted sexual assaults on women-all in their mid 30s to late 40s-at locations near the I-5 corridor.

Seattle Police say detectives have not yet developed any leads conclusively linking the four incidents.

But while police have yet to link the crimes, three victims described their attacker as a white male, 20 to 30 years old, between 5-foot-7 and 6 feet, 140 to 160 pounds, with short brown hair.

The Northgate attack suspect pictured in the sketch also had sunken light blue eyes, a tattoo under his left forearm, and a gravelly voice.

Police are also investigating a Sunday evening attack in Greenwood, where two masked men tried to force a woman into a van. Detectives believe the attempted kidnapping does not fit the pattern of the three other attacks and currently believe the incident is unrelated.

Patrol officers and detectives are canvassing North Seattle neighborhoods looking for surveillance cameras, which could help identify a suspect, and are also looking for other witnesses who may have seen or heard anything around the time of the attacks.

Police want to talk to cyclist who stopped Green Lake attack

Police are trying to track down a cyclist who helped stop the early morning attack at Green Lake on Monday.

Sometime between 6:20 and 6:30 am Monday, a female jogger was running through Green Lake Park when a man ran up behind her and tackled her to the ground near E. Green Lake Drive and Meridian Avenue.

A male cyclist saw the attack and helped scare of the suspect, then chased after the man before returning to Green Lake Park to check on the jogger. After the jogger said she was OK, the cyclist left.

Detectives are interested in speaking with the cyclist because believe he may be able to provide a good description of the suspect.

Anyone with information about these cases, or any additional incidents, should call 911 or the Sexual Assault Unit at (206) 684-5575.

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