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Armed police descended on a Tonbridge street last night after reports of a man carrying a weapon.
Firearm officers were called to Avebury Avenue after claims woman had been mugged by an armed man.
A 21-year-old man from Westerham was arrested on suspicion of robbery. He remains in police custody.
Kent Police said armed officers were called to help patrols investigating a street robbery at about 9.45pm.
A spokesman said a dog unit was also sent to the scene, off Tonbridge High Street.
He added police are looking for a second man and carried out a search of nearby roads.