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Officers seized mobile phones, cash and wraps of what is believed to be cocaine after stopping a car while on patrol.
Three people from London have been arrested on suspicion of possession with intent to supply Class A drugs.
Officers from Kent Police's Roads Policing Unit became suspicious of a vehicle in London Road, Swanley in the early hours of this morning.
They found the items after stopping the car, and more drugs were recovered following a search of those arrested.
An 18-year-old woman from Eltham, a 19-year-old woman from Sidcup, and a 23-year-old man from Eltham were taken into custody.
Inquiries are ongoing.