They were parked up overnight quite close together in Samangan province Northern Afghanistan en route to NATO forces in the south having started their journey in Uzbekistan.
This route had been opened after Pakistan had banned convoys supplying NATO forces following the killing of 24 of their forces on the border by a US air strike. Although the ban has since been lifted normal traffic from the south has not been fully restored.
The Taliban planted a huge bomb under one of the tankers in the small hours and because of their proximity to each other the whole convoy exploded this morning.
This action is a comparatively new departure for the Taliban who have concentrated their campaigns up to now in the south.
The fires have yet to be extinguished and are sure to have had a considerable impact on NATO forces operations.