A 10-mile stretch of the M5 near Gloucester has been shut after a dead body was found this morning.
Officers warned they will be at the scene for "some hours" while they recover the body.
The motorway has been closed in both directions between junction 11A and 12.
It's likely to cause extensive traffic disruption as motorists seek alternative routes to reach the Midlands and the South West.
The incident was reported shortly before 4.10am today, a Gloucestershire police spokesman said.
He said: "Officers attended the scene, on the southbound carriageway around a mile north of Gloucester Services, and have closed both sides of the motorway while the body is recovered and a serious investigation takes place.
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"Diversions have been put in place but significant disruption is expected this morning and is likely to last for a number of hours while police continues to work at the scene and establish the circumstances."
Anyone who have information should call police on 101 and quote incident 34 of October 30.
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