State Police say traffic is being restricted to one lane on Interstate 79 Southbound as firefighters work to extinguish a tractor-trailer fire near Stoneboro.

Flames spread from the tires to the trailer of the truck one mile south of Greenville-Sandy Lake Road interchange shortly after 5 a.m Monday.

Firefighters from two departments were on the scene.

Troopers say southbound traffic will be restricted until the fire is put out.