The tractor, which was towing a trailer, was blocking one lane close to Dobbies Island. A small section of the road is closed between the Hanwood roundabout towards Meole Brace. Police and a recovery vehicle were in attendance.
LPPT North tweeted: "Assisting @ShrewsburyCops and @OPUShropshire A5 from Hanwood roundabout towards Meole Brace is currently closed due to a lorry fire. Please use an alternative route for the time being. #police #shrewsbury."