Available 
Seattle, WA (June 15, 2026) – One person died following a two-vehicle collision on Interstate 90 near the Mt. Baker Tunnel in Seattle.
According to information released by the Washington State Patrol, the fatality occurred in a two-car crash. The wreck took place on I-90 near milepost 3.9 in the vicinity of the Mt. Baker Tunnel.
Limited details about how the vehicles came into contact were included in the initial bulletin. The number of people involved and the identity of the deceased person were not released in the preliminary report.
Investigators are continuing to examine the circumstances surrounding the collision and may provide additional information at a later time.
Our hearts go out to the family and friends mourning this loss.
What Information Is Commonly Gathered After a Fatal Highway Collision?
After a fatal highway collision, investigators typically collect a wide range of information to determine what occurred. This process often includes reviewing vehicle positions, roadway markings, weather conditions, traffic patterns, and any physical evidence left behind.
Data from vehicle systems may also be examined when available. Witness statements can help establish a timeline, while surveillance footage or traffic cameras may provide additional insight into the moments leading up to the crash. Investigators frequently analyze factors such as speed, lane usage, visibility, and driver actions before the vehicles come together.
Medical and forensic findings may also contribute to the overall review. In many cases, a complete understanding of the circumstances takes time because investigators must compare multiple sources of information before reaching conclusions about the sequence of events.
