A bomb planted by the Taliban in northern Afghanistan has destroyed 22 Nato fuel tankers carrying supplies to coalition forces, local officials say. The vehicles were hit by a pre-dawn explosion which triggered a huge fire that engulfed them in flames, they say. At the time, the trucks were parked overnight in Samangan province, as they headed from Uzbekistan towards Nato forces in the south. Police told the BBC that the fire caused by the bomb is still burning. An intelligence official said the device was attached under one of the trucks, which were parked close together.