Long delays are building on the approach to the Dartford Tunnel following a crash.
The carriageway is blocked on the A282 Essex-bound, from the M25 Junction 2 for the Darenth Interchange and Junction 1 for Bob Dunn Way.
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Lanes two, three and four are all closed.
National Highways says the road is closed clockwise between J6 near Godstone and J7 near Redhill due to a police incident.
Emergency services have been approached for further details.
