Three horses died and one was seriously injured early Friday morning after being struck by a semitrailer north of Poulsbo, said officials with the Washington State Patrol.
The collision happened on State Route 3 just before 3 a.m.
Troopers said four horses were walking on the roadway when a semi, passing Big Valley Road, hit the animals.
The 27-year-old driver stopped his vehicle, which blocked the northbound lane.
According to the State Patrol, three of the horses died at the scene and the fourth was taken to Sound Equine Veterinary Hospital with serious injuries.