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Emergency services were called to the scene of a crash on the M25 near junction two following a crash.
Two cars were said to have collided blocking two lanes one and two of the anti-clockwise carriageway at the Darenth interchange.
Highways England later just tweeted that lane two has been cleared, but traffic is delayed back to junction three.
It is not known if there are any serious injuries.
Earlier police had warned of another crash between junction 29 and 30 which has been causing long tailbacks near the Dartford Tunnel.