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Two axeman were chased away as they attempted to raid a post office.
It is understood the manager of the branch in Southfleet Road, Bean, was slightly injured as he confronted the men at 11.15am.
The pair stole a small quantity of cash before leaving the business, reportedly driving away in a red Volkswagen Golf.
One man was arrested at around noon in Priory Road, Dartford.
He remains in custody on suspicion of robbery.
Anyone with information should call police on 101 quoting cad reference 05-0584.