A fingertip search is being carried out on the northbound carriageway of the A444 near Nuneaton, after the discovery of a man's body earlier today.
Police believe the man may have been struck by a vehicle.
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Police said the men were detained during a 'safety and security operation'.
Mark Orme was last seen on Sunday.
The 24-year-old was charged with 14 counts of wounding with intent to do grievous bodily harm and one count of throwing a corrosive fluid.