Police are asking motorists to avoid the junction with the New Castletown Road to the NSC entrance.
It comes following an incident on Groves Road in Douglas earlier this morning.
Officers have confirmed the road is closed due to what's being described as a 'police incident' - it's not yet known when the road will re-open.
Police hunt biker who fled officers
Do you know this rider or the motorbike they’re on?
Youngsters blamed for trashing party field
Residents have hit out at irresponsible youngsters who've been littering a field in Douglas since school holidays started.
Drainage work means Mountain Road closure this evening
Part of the Mountain Road will close for a second time today later.
Riley's announce date for Christmas Market
The countdown to Christmas is on for an Island garden centre.
Salsa Festival will shimmy its way to the Island next month
A two-day salsa event will be turning up the heat when it lands on the Isle of Man next month.
Asbestos contamination at civic amenity site
A civic amenity site says it can't take any rubble or soil after someone dumped asbestos in a skip.
Driving manoeuvre practice banned from test centre
There'll be no more practicing three-point turns or reversing around corners at the Vehicle Test Centre.
Youngsters rescued from Port Jack
Coastguards and Douglas lifeboat were called to help a group of youngsters stuck at Port Jack last night.
