A two-car head-on collision — including the causing vehicle driving the wrong way — on Interstate 90 eastbound near Island Crest Way on Mercer Island resulted in three fatalities on the late evening of Oct. 29, according to Washington State Patrol trooper Rick Johnson’s X page.

“The driver of the causing vehicle and both occupants of victim vehicle were the fatalities,” reported public information officer Johnson, who said they received the first call at 11:57 p.m.

Johnson said some drivers called 911 to report the causing vehicle traveling the wrong way prior to the collision.

“Troopers were in the area actively looking for this vehicle when the collision call came out,” said Johnson, adding that the initial patrol trooper immediately on scene put out a small vehicle fire with their extinguisher.

As of this afternoon, Johnson and his agency didn’t know if the causing driver was under the influence. He added that the King County Medical Examiner will conduct a toxicology report and is in the process of identifying the deceased and notifying their next of kin.

According to a state patrol press memo, the causing vehicle driver was a 30-year-old male Seattle resident; the victim vehicle driver was a 22-year-old male Bellevue resident and the passenger was a 23-year-old from Berkeley, California.

State patrol troopers, a sergeant and detectives were on scene and received assistance from the Mercer Island fire and police departments and Washington State Department of Transportation, Johnson said.

All eastbound lanes were closed until about 5:23 a.m. on Oct. 30 and traffic was diverted off to Island Crest Way.