Afghan officials say 22 NATO supply vehicles have been blown up by a bomb planted on a truck.
The magnetic device exploded before dawn as the fuel tankers were parked. They were in northern Afghanistan having come from Uzbekistan.
Three drivers were injured. The Taliban has claimed responsibility.
Earlier this week, another attack destroyed three trucks south of Kabul.
Pakistan recently reopened border crossings after blocking NATO supplies for seven months in retaliation for US air strikes that killed 24 Pakistani soldiers.