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The police helicopter was scrambled to join in a search for a lorry after people were reportedly seen on its roof as it travelled along a motorway.
People were reported to have been seen on top of the HGV on the London-bound carriageway of the M2 between junction five for Sittingbourne and junction four for Chatham just after 9.30am today.
Officers travelled along the motorway and spoke to a lorry driver who was stationary at junction two for Strood.
A police spokesman said: "The vehicle was searched and there was no trace of anybody in the rear or on the roof.
"The police helicopter assisted in the search for the lorry."
Did you see the men on the lorry? Contact the newsdesk on 01634 227803.