Police are appealing for information after a man in need of urgent medical treatment was found in a van on the side of a motorway and later died.
Essex Police were called to reports of an unattended dark-coloured van on the hard shoulder of the M11 between Redbridge roundabout and Loughton shortly after 8pm on Monday.
Officers discovered a man in the vehicle who required hospital treatment.
He was taken to a nearby hospital but has now died, the force said.
Police say they are treating his death as “unexplained”.
The force launched an appeal on Sunday, saying they are looking for witnesses and dashcam footage of “any suspicious behaviour”.
“We are now appealing for anyone who noticed any suspicious behaviour on the M11 between the Redbridge roundabout and Loughton between 7.30pm and 8.10pm on Monday, 11 April, or caught any suspicious behaviour on dashcam to come forward,” Essex Police said in a statement.
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“If you have any information you can submit a report online or use the ‘Live Chat’ button to speak to an online operator between 7am to 11pm.
“You can also call 101. Please quote incident 1121 of April.”