The Washington State Patrol says at least one person killed following a crash in Spokane Valley early Saturday morning.

Details are still limited, but Troopers say the one car crash happened on the Sprague off ramp of westbound I-90.

The roadway was fully blocked early Saturday morning as WSP and the Spokane County Sheriff's Office responded.

The cause of the crash is unknown at this time, but this article will be updated when additional information becomes available.