Three men were killed and two people seriously injured in a road crash on the B1248 road between Wetwang and Norton in the Wharram area.
The crash happened shortly after 6am today and involved a car and a van, which were travelling in opposite directions.
The B1248 was closed following the collision and diversions were put in place.
Janice Bryan, press officer for North Yorkshire Police said: “Officers are appealing for the driver of a van to come forward which was seen travelling along the B1248 towards Malton just after 6am and may have seen the vehicles immediately before the collision occurred.
“The driver could be a vital witness to the incident and we urge them to come forward as a matter of urgency.”
The white van driver and any other witnesses are urged to contact North Yorkshire Police on 101 and pass information to the Force Control Room.