At approximately 9:50 pm on Sunday 8 July 2018 a serious road traffic incident occurred on the junction of Southernwood Drive and Westfield Way, Swindon involving a blue Vauxhall Corsa, a red Toyota Yaris and a pedestrian.
The occupants of the Corsa fled the scene.
A 75 year old man from the Toyota sustained life threatening injuries and was taken to John Radcliffe Hospital.
Police are keen to trace any witnesses to the incident, anyone who may have seen the vehicles prior to the collision and anyone who was in the area at the time and may have any dash cam footage.
Anyone with information is asked to please contact Wiltshire police, Tri-Force Road Policing Unit on 101 quoting reference 54180062834 or alternatively contact Crimestoppers anonymously on 0800 555 111