KITTITAS, WA : A collision between two semi-trucks including a tanker on Thursday, August 10, 2017

A collision between two semi-trucks, including a tanker, blocked westbound Interstate 90 and critically injured at least one person Thursday afternoon.
The left lane opened before 3 p.m. But there was a long backup.The crash occurred at milepost 126 near Kittitas and east of Ellensburg, the Washington State Patrol said.
Photos show a tanker truck and truck carrying hay were involved.
There were concerns that there had been a fuel leak. But the State Patrol later said there had not been a leak.
A helicopter has landed and will take at least one patient to a hospital.

Source :
2 semis crash on west I-90 in Kittitas