Interstate 90 near Vantage is down to one lane in each direction after a semi hit the center barrier, leading to a multi-vehicle collision.
Five people in two passenger vehicles involved were transported to the hospital but only two people were injured and the others taken as a precaution, said Trooper John Bryant of the Washington State Patrol.
One person suffered an apparent broken leg, believed to be the most serious injury.
Just before 2 a.m. the westbound semi lost control and hit the center concrete jersey barrier. The semi’s tractor jumped over the barrier and jackknifed, hitting two vehicles.
Those passenger cars were then hit by another semi, Bryant said.
He said the accident remains under investigation and it is uncertain if it was a weather-related accident. Bryant said I-90 likely won’t be fully reopened until at least 6:30 p.m.