A truck accident and fire has closed the northbound lanes of the Pacific Highway north of Karuah.

Newcastle Fire Command says a semi trailer carrying a load of paper overturned just before 1.30 on Thursday morning between Tarean Road and the Karuah River.

The driver suffered head injuries and has been taken to the John Hunter Hospital in a stable condition.

Several fire trucks and RFS units are at the scene.

It’s expected the highway will remain closed for some hours.

Northbound traffic is being diverted at Tarean Road.