Drivers are facing delays after a three-vehicle collision closed one of the Dartford tunnels.
The right-hand tunnel has been shut and emergency services are on the scene.
A height restriction of 15ft 9in has been put in place and things are expected to be clear at around 1.30pm.
Ambulance service spokesman Rich Airey said: "One ambulance crew attended the scene and one patient has been taken to Darent Valley Hospital."
Police have been contacted for more information.
More as we get it.