Damir Shalako, 25, who has an “SF” tattoo on his face along with others on his neck, was last seen shirtless, wearing only a pair of jeans, police said.
The assault took place around noon on Tuesday at the Potrero Hill Housing Authority Development, and police said they believe Shalako may be traveling by public transit.
He is described as 5 feet 8 inches tall, weighs approximately 170 pounds and has black hair and brown eyes.
Shalako is on parole from Santa Rosa and is considered dangerous. Police said he is thought to have family in San Francisco and associates in the Lassen County city of Susanville.
Anyone who sees Shalako should call 911.