Police have closed part of the M20 after an "unexplained" death on the London-bound carriageway near Ashford.
Motorists have been delayed since 6.05pm on Tuesday, when police were called to the discovery of a body between junctions 10 and 9.
Paramedics were also called, but the person – who has not been identified – was pronounced dead at the scene.
The carriageway is expected to remain closed until at least lunchtime on Wednesday while officers continue to investigate the area.
Highways England has advised drivers heading towards the capital to leave the motorway at junction 10 for Ashford to avoid the "very serious incident" – and rejoin at junction 9 for Canterbury.
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Kent Police is treating the death as "unexplained" and is appealing for anyone who saw a pedestrian in the area, or who has any other information, to come forward.
:: Anyone who can assist should call the Serious Collision Investigation Unit on 01622 798538, quoting reference 20-0913, or email firstname.lastname@example.org.