Three people have died after a car towing a caravan in the wrong direction crashed into two other cars on the M40 in Oxfordshire.
The collision happened in south Oxfordshire on Monday afternoon, Thames Valley Police said.
A Subaru was travelling south on the northbound carriageway when it hit a Ford Mondeo and a Ford Focus.
The driver and passenger in the Subaru, both in their 80s, and the driver of the Mondeo, who was in his 30s, died in the accident.
Thames Valley Police said no-one else had been injured in the crash, which happened between junction 6 and junction 8A.
Sgt Beth Walton told BBC News: "We are in the early stages of the investigation, in which sadly three people died and our thoughts are with their families.
"I would ask anyone who has footage not to share it and to remove it from social media out of respect for the families and friends of the people who died."
The carriageway was closed overnight but has since reopened.