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Three lanes have been closed and traffic is stationary after a crash involving a car and a lorry.
The accident happened on the M2 east-bound before J3 for the A229 (Chatham/Rochester).
Congestion is back to J2 for Strood and Rochester.
Kent Police roads officers reported there had been a slight injury crash. Officers have been working with highways officers and firefighters to clear the road.
A spokesman for Highways England said at around 7pm that traffic officers are on the scene and emergency services are en-route.
They advised motorists to allow extra time for their journey.
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