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A man has been arrested after plain clothes police officers found suspected live ammunition and bullets during a search of a car.
At around 10.30pm on Wednesday officers were patrolling the Londonbound carriageway of the M20 when they spotted a suspicious Volkswagen Golf.
The car was brought to a stop at a location close to Junction 7 in Maidstone before it was then searched by officers.
Items believed to be a firearms magazine and bullets were discovered inside. Cannabis was also seized.
A 43-year-old man from Sheerness was arrested on suspicion of possession of firearms and possession of drugs.
He has since been released pending further investigation.