The White House voiced “great concern” on Friday over the loss of civilian life following reports that a NATO airstrike in Afghanistan killed as many as 90 people. Spokesman Robert Gibbs said the incident, which happened earlier Friday when NATO aircraft attacked two fuel trucks that had been hijacked by the Taliban, would be investigated. “Obviously, any time there is loss of life in a conflict like this, particularly the civilian loss of life, it's something we've expressed in the past and continue to express great concern about,” Gibbs told reporters. The spokesman also stressed that the U.S. ambassador in Kabul, Karl Eikenberry, had been involved in previous such investigations and offered U.S. condolences to the families of those who were killed. Officials said the NATO bombing of two fuel tankers killed 56 to 90 people. The trucks, traveling from Tajikistan to Kabul, were hijacked in northern Kunduz by the Taliban. Officials said the dead were mostly insurgents.