A new appeal has been launched to trace witnesses to an accident in which a man was killed on an Oxfordshire road.

Police today renewed their appeal for help in piecing together the events which led to the accident on the A34 at about noon on April 17.

George Sagg, the driver of a red Renault Clio, was killed when his car was in collision with a silver Vauxhall Vectra on the northbound carriageway, near the Marcham interchange.

Both cars ended up in a nearby field. Mr Sagg, 27, of north London, died at the scene.

Three men aged 20, 22 and 29, were arrested on suspicion of causing death by dangerous driving and have been released on police bail until June 3.

Sgt Paul Thornton, who is investigating the crash, said: "Several people stopped at the scene, but continued their journey without leaving their details. I would ask these people to contact police immediately."

Anyone with information should call 01235 556920.