Seattle police are investigating the attack on a woman while she was jogging early Saturday morning at Green Lake.

At 5:30 a.m. Saturday, an 89-year-old woman was jogging around the lake when a male knocked her to the ground. The victim screamed and kicked, and the attacker ran off, according to Seattle police. The victim was able to flag down a passerby and called 911.

Police searched the area but did not find the assailant.

The victim was not injured and declined medical attention, police said. There is no suspect description available.

Police said it is not known if the attack is related to other recent attacks on women in or near Seattle parks. Police say a connection is possible, but a link has not been established.

There have been four such assaults since October. The most recent occurred Dec. 7, when a 44-year-old woman jogging in Colman Park was attacked from behind. The victim kicked, screamed and broke free, according to police.

On Oct. 11, a 55-year-old woman in Seward Park was grabbed from behind by a man with a knife. She also broke free. The victim gave this account of the incident to Times staff reporter Sara Jean Green.

On Oct. 26, a woman was walking her dog on Lakeside Avenue South just north of South Day Street when a man approached her and repeatedly asked her something in Spanish, police said. The woman continued walking and the man followed her and grabbed her arm, pulling her toward an area underneath the Interstate 90 overpass. When the woman screamed and shoved the man, he struck her on the head and fled.

On Nov. 16, a 32-year-old woman was walking west on the pedestrian/bicycle path alongside westbound Interstate 90 near the east end of the Mount Baker tunnel when she was confronted by a man with a small folding knife. The man grabbed her and attempted to drag her into some bushes, police said. The woman fought off her attacker and was able to escape.