Armed police stopped traffic on the M6 in Lancashire to "arrest" a man at gunpoint.
But the incident between junctions 33 and 32 on the southbound carriageway was simply part of a training exercise between Lancashire Police's armed unit and motorway police.
The force put out a rolling road block slowing traffic down to 40mph as t
he exercise took place at around 12.20pm on Tuesday.
A passing motorist, who witnessed the drama as he headed north, said the man appeared to have been driving a green Ford Galaxy.
He said: "There was a man in the middle of the road with his hands up in the air.
"There were a least six police officers with guns surrounding him and 12-15 officers altogether."
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