The A1(M) northbound in County Durham is closed between Junction 61, the A688 Tursdale Road for Bowburn and Junction J62, the A690 road at Carrville, according to live traffic and travel database Inrix. National Highways reported at 2.08am that police were at the scene.
There were no details about the number of vehicles involved or if there were any injuries caused by the incident.
Durham police have confirmed the closure will be ongoing for some time.
The force tweeted: “As stated, this closure will be ongoing for some time yet.”
National Highways said details from the scene indicate that the closure will remain in place until the early afternoon or later.
It added that delays are likely on the approach to the closure with additional journey times expected on diversion routes.
Motorists have been advised to exit the A1M at J61, take the first exit on to the A688 and travel on this road until the roundabout with the A167 (Thinford Roundabout).
They are then asked to take the fourth exit on to the A167 northbound, to stay on this road passing through Durham City and Chester-le-Street to the roundabout with the A1M J63.
National Highways then recommends taking the second exit to rejoin the A1M northbound.
More to follow…