The Mountain Road has shut between the Bungalow and Creg ny Baa.
Police say with just an hour to go before roads around the course are due to close, they're dealing with a crash.
They say the incident happened at the 32nd Milestone.
Traffic is being diverted away from the scene via Creg ny Baa and the Bungalow.
Court rejects fraudster's freemason conspiracy claims
A man serving UK prison time for fraud and forgery isn't the victim of a shadowy criminal conspiracy involving Freemasons, a court has found.
Government working to refresh economic strategy
Enterprise Minister Tim Johnston says the government's been working hard to make sure it's economic strategy is keeping up with the latest events.
Drone ban for skateboarding championship
The Civil Aviation Authority says drones will be banned from the Mountain Road this weekend.
Pick it up plea from Castletown commissioners
Castletown commissioners have issued a plea to the ancient capital's dog owners.
New online Isle of Man guide for refugees and asylum seekers
An organisation which supports the rights of refugees has updated its website with a guide to legal assistance on the Isle of Man.
Lifeboat called to yacht's rescue
Ramsey lifeboat was called out to help a yacht off the Scottish coast last night.
Government reveals TT viewing figures
Just one in five people who sign up for the Department for Enterprise's TT streaming service pay for the live coverage.
Final wind farm hearings set for July
The final meetings and hearings for the proposed Mooir Vannin Offshore Wind Farm have been announced.
