Two children hit their heads when a school bus and a semi truck crashed near Marysville.
The crash occurred on Highway 9 at 84th Street shortly after 9 a.m.
Both an 8-year-old and a 6-year-old hit their heads during the crash and were transported to the hospital as a precaution, according to the Mukilteo School District.
The Washington State Patrol said their injuries were minor. The driver was not hurt.
The two children were the only passengers on the bus.