The collision involved two sedans and five people near 112th Avenue SE and SE 316th Place. Two people suffered serious injuries, while two others had injuries that were not considered life-threatening, according to the Auburn Police Department.

Police are investigating impairment as a possible contributing factor; they have not said whether it was confirmed. The department’s Traffic Unit was asked to assist with the investigation.

Both directions of the roadway were closed while officers investigated, and police said the closure was expected to last several hours. No further information about the people involved or the circumstances of the crash was provided.