A man found dead after being struck by several vehicles on the M1 overnight may have been hiding in a lorry, police have said.
The man, identified by police as 46-year-old Ashley Hayes, was found on the northbound carriageway between Junctions 16 and 17 in Northamptonshire in the early hours of Tuesday 11 January.
Police believe he was run over several times by vehicles as he lay on the stretch of road.
Police investigating the incident believe Mr Hayes' death could be suspicious and officers are appealing for witnesses to come forward.
Mr Hayes is thought to have been at Toddington Services in Bedfordshire at around 1.30am before making the journey.
He may have been given a lift from there, or may have hidden himself in a lorry, to enable him to get to where we discovered him.
"We need anyone who was there at the time and may have seen him or witnessed anything suspicious to contact us". "It may be an innocent accident or something more serious". "We need to determine the circumstances that led to his death".
Detective Sergeant Hopkins added: "There will be lorry drivers and other motorists who may have driven this stretch of road and some of them may have dashboard camera footage".
"We can confirm that the body appears to have come into contact with several vehicles on the M1".
There is no nearby bridges or footpaths and officers were initially unsure how he arrived at the scene.
"The particular stretch of road is unlit and there are road works restricting the speed limit".
Mr Hayes' family have been informed but have declined to comment. "No one would be expecting there to be any pedestrian on that section".