"An unknown vehicle attempted an unsafe pass while traveling at an excessive speed," the bus company said in a statement

Four people were killed and seven others were injured when a car collided with a passenger bus Sunday in Washington state, authorities said.

Four people were injured Friday evening when their vehicle was struck by a driver trying to pass them as they turned left, according to the Washington State Patrol. All four were taken to Providence Centralia Hospital, including two boys, ages 6 and 5, troopers say.