A man has been killed after being struck by four vehicles on the M66 in Greater Manchester.
Detectives believe the man was walking along the northbound lanes of the motorway between junctions two and three when he was hit by an Audi A5.
The victim was then struck by three vehicles on the southbound carriageway.
Greater Manchester Police were called to the motorway at about 1.57am on Saturday, but the man was pronounced dead at the scene.
Officers have arrested a 19-year-old man on suspicion of driving under the influence, and he remains in police custody.
Sergeant Helen Hallworth, from the Serious Collision Investigation Unit, has appealed for any dashcam footage from motorists who were driving in the area at the time, as it will assist her team in investigating the "tragic death".
She added: "We believe we have identified this man and we have now spoken to his next of kin.
"However, we still need witnesses who may have seen this man walking up the motorway to contact us as a matter of urgency."