Road likely to be closed until 7pm
People are being urged to avoid St Marks following a road traffic collision.
The road is closed between the crossroads and Clanna Road crossroads.
Police say it will stay shut until at least 7pm.
Motorists have been asked to avoid the area and take an alternative route.
Mountain Road closure extended for additional 24-hours
The Department of Infrastructure is completing carriageway repairs
Manx Care issues service update ahead of TT
It's the 'busiest time of the year for our health and care services'
Weekend road closures in place for Pre-TT Races at Billown
Racing set to continue in the south of the Isle of Man
Feedback sought on health and safety laws
Regulations have not been reviewed or amended in over 20 years
Entries open for Sovereign Art Foundation student art prize
The winner gets £800 for themselves and £2,000 for their school