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Queues are building following a three-vehicle collision, which has closed the A20 London Road at Ditton.
The crash happened shortly after 3pm and three vehicles were involved.
The road is closed in both directions with delays building up on either side of the crash site.
Police, ambulance and the fire service are all in attendance.
Four people are believed to have been injured and one is expected to be taken to hospital although no serious injuries have been reported.