Emergency services are tackling a fire at a gas conversion garage in Darlington.
There are also reports of explosion at the building on Cleveland industrial estate in the Albert Hill area.
The air ambulance is taking one casualty to Newcastle's RVI.
He's believed to have arm and head injuries.
More top news
Emma brings you Sunday night's forecast
Alfie suffered a fracture to his left frontal sinus area and the hammer caused a depression in the bone.
Supermarket chain issue recall of certain packets of Ready to Eat Peppered Beef Slices after testing identified 'low levels of Listeria'.