A woman who was killed on the A47 collision at Terrington St John on Sunday may have been pushed into the road, say police.
Officers have now confirmed that they are treating the crash in which the woman and a man were killed, as suspicious.
The man and woman had been walking barefoot along the A47,
The incident happened at about 2.15pm on Sunday (July 20) when a silver Kia was involved in a collision with two pedestrians on the eastbound section of dual carriageway close to the Mill Road bridge.
Post mortem examinations carried out yesterday revealed the man died from severe head injuries while the woman suffered multiple injuries, both consistent with being involved in a collision with a vehicle.
Det Chief Insp Paul Durham, from the Norfolk and Suffolk Major Investigation Team (MIT) confirmed the incident was now being treated as suspicious, with the focus being on a line of enquiry which suggests that the woman was forcibly pushed into the carriageway.
DCI Durham said: “Although our investigation is in its early stages, initial enquiries have given me sufficient cause for concern that this was more than just a tragic accident.
“As a result I’m appealing to anyone who was in the area at the time and may have witnessed the collision – or seen the two pedestrians shortly before the collision - to come forward, no matter how insignificant the information may seem to them.”
The man is described as white, 6ft 1in, of slim build with short dark hair. He was wearing blue denim jean shorts and a grey t-shirt. The woman is described as white, 5ft 7in, of slim build, with long auburn coloured hair. She was wearing a bright pink t-shirt and black knee-length leggings. It is believed that both may have been walking barefoot for some time in the general direction of King’s Lynn.
Anyone with information should contact the Norfolk and Suffolk MIT on 101.