First responders called to the scene of a two-vehicle collision got more than they bargained for after an ambulance was struck from behind while attempting to administer aid. St. George Police Officer Andrew Mickelson told St. George News first responders were initially dispatched to a collision at the intersection of Riverside Drive and River Road before 4 p.m. Monday. A gray Toyota Sienna van was driving north on River Road and attempting to complete a left turn to travel east on Riverside Drive. As the Toyota began to turn, a gold Buick entered the intersection traveling south on River Road. The van failed to yield to oncoming traffic, colliding with the Buick in the middle of the intersection.