Rush hour traffic is being delayed following a road traffic accident at the Montgomery junction opposite the Nag's Head at Gartmyl which happened at around 5-15pm tonight.
A fire service rescue tender along with ambulances and police are at the scene.
A passing motorist told MyWelshpool: "There are long delays and it looks like someone is trapped.
"Motorists are advised to avoid the area if they possible can or they will face a long wait."