A man has died after a crane fell from a yard on to the M25.
The man, who is believed to have fallen from the crane, was pronounced dead at the scene.
Police said the crane ended up on part of the carriageway, leading to disruption for motorists in the area.
The incident happened between junctions 16 and 15 of the M25 anti-clockwise in Buckinghamshire, Thames Valley Police said.
A police spokesman said: "Officers were called at 9.21am to reports that a crane had fallen from a site next to the motorway. A man is believed to have fallen from the crane. He died at the scene. Emergency services are currently attending the incident and the lane is likely to remain closed for some time."
The unnamed man who died is believed to have fallen around 130ft but there were no other casualties, according to South Central Ambulance Service.
A spokesman described the structure as a "cherrypicker". He said: "We were called at 9.19am to a location beside the motorway of the M25 just prior to the exit slip at junction 15 anti-clockwise in Iver.
"We had reports of a cherrypicker having toppled over and landed on the hard shoulder of the motorway. We sent two double-manned ambulances, one from London and from South Central Ambulance Service."
An air ambulance also attended the scene. The spokesman added: "There were no other casualties, just the one gentleman who fell something like 130ft."