The trucks were seized as they were delivering fuel to NATO forces in the northern part of the country, Afghan officials said.
Among the dead was a Taliban commander and several senior fighters, the governor of Kunduz province said. NATO confirmed the airstrike but gave no details on the hijacking or civilian deaths. Many of the civilians were siphoning fuel from the trucks, The New York Times reported.
General Stanley McChrystal, the new commander of NATO and U.S. forces has said that he wants to put a stop to high civilian casualties.