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A 39-year-old has been arrested on suspicion of robbery and possession of Class A drugs.
Officers were called to City Slots, High Street, Chatham, yesterday afternoon.
A suspect, who comes from the town, was later arrested and remains in custody.
It is unknown how much cash was taken in the raid, which happened just after 4pm.
The Arcade Manager said: "I saw them on the CCTV and just rang the police straight away.
"By the time I got down here they ran out past me.
"There were two of them, one came in first to see the place and then the other man came in minutes later."
Witnesses or anyone with information regarding the robbery is asked to call police on 01634 792209 quoting 46/20609/20.