Two people were killed in a car crash with a Washington State Patrol trooper just west of Seattle, authorities said Saturday evening. The trooper was not seriously injured in the Saturday crash, but was transported to a hospital as a precaution.

The Mason County Coroner identified the two killed as Washington residents Charles Ferree, 72, and Deolia Blandford, 49, on Sunday.

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The trooper, who has not been identified, was driving on U.S. 101 with emergency lights and sirens on when the trooper T-boned a Toyota Prius at an intersection, said Deputy Matt Colbenson, spokesperson for the Mason County Sheriff's Office.

Washington State Patrol released a brief statement Saturday about the crash and declined to comment, citing the agency's own involvement in the case.

The sheriff's office is leading the investigation.