At least 18 Afghan civilians were killed last week in U.S.-led airstrikes, the United Nations says. The NATO-organized operation saw the U.S. perform 30 airstrikes in Afghanistan's Helmand province, the U.N. reports. While the strikes were intended to target Taliban fighters, at least 18 civilians were also reportedly killed during attacks last Thursday and Friday. The civilians were mostly women and children. U.S. military officials said they are still conducting their own investigation into whether civilians had died in the strikes.