Breaking: Four Marines dead in Kabul airport bombing

The U.S. ambassador in Kabul has told staff there that four U.S. Marines were killed in an explosion at the city’s airport and three wounded, a U.S. official with knowledge of the briefing said. Two explosions ripped through crowds of Afghans trying to enter the airport on Thursday.

At least three U.S. troops were injured, a U.S. official said. Witnesses reported multiple fatalities among the Afghans, many of whom were trying to enter the airport because they had assisted U.S.-led coalition efforts and feared persecution by the Taliban.