A Healdsburg man apparently killed himself Monday morning after attacking his roommate with a kitchen knife, a Healdsburg police sergeant said.

The body of the 32-year-old Healdsburg man was spotted by the Sonoma County sheriff's helicopter crew during a search near the Russian River just inside Mendocino County, Sgt. Kevin Young said.

His death currently is being investigated as a suicide.

His roommate, a 39-year-old Healdsburg man, was being treated at Santa Rosa Memorial Hospital for deep slice wounds to his neck. The man was expected to survive, Young said.

The man told police he'd been sleeping on his couch early Monday when he awoke to find blood pouring from his neck and throat and his roommate standing over him with a knife.

After the two struggled, the bleeding man asked his roommate for a ride to the hospital, but the suspect left in the victim's car.

The wounded man walked to a neighbor's home and was driven to Healdsburg District Hospital.

Because the case appears to be domestic violence, the name of the injured man wasn't released. The suspect's name won't be released until his family has been told of his death.

Hospital workers called police at about 6:30 a.m. and officers launched a search for the roommate and car.

Other law enforcement agencies were alerted to look for the suspect, who was considered armed with a knife and dangerous.

Healdsburg officers Monday began gathering evidence at the Healdsburg Avenue home north of town and found a kitchen knife believed to have been used in the stabbing, Young said.

Meanwhile, officers were searching northern Sonoma Count, believing the suspect might had headed toward Geyserville.

A Sonoma County sheriff's deputy spotted the car, a red Jetta, north of Cloverdale near the Mendocino County line. The sheriff's helicopter crew spotted the body at about 8:30 a.m.

An autopsy is to be performed by the Mendocino County Coroner's Office. The cause of death remains under investigation, Young said.