On April 17, 2017, at approximately 5:44 am, State Police responded to a serious motor vehicle crash in the westbound lanes on the New York State Thruway in Ontario County. When Troopers arrived at the scene, they observed a single vehicle overturned and on its side in the right lane.The male operator was taken to Strong Hospital in critical condition. An adult female passenger was also taken to the hospital for non life-threatening injuries. Two children, ages 9 and 11, were pronounced dead at the scene. All westbound lanes on the State Thruway are closed for several hours during this investigation.The State Police are looking for a second vehicle not involved in the initial accident, but may have unknowingly struck one of the children. Troopers are looking for a Honda vehicle with some damage to the undercarriage and is leaking fluids. Anyone with information on this vehicle is asked to call the State Police at 585-389-4100. The investigation is ongoing.