At least 15 people were killed—including six Americans— after a suicide car bomb detonated beside a NATO convoy in Kabul early Thursday. Officials in Afghanistan say the explosion came from a Toyota Corolla, where the bomb was allegedly planted by an extremist group. A NATO SUV carrying “foreign advisers” was decimated in the blast, which also destroyed close to a dozen homes. Hezb-e-Islami, a group with close ties to the Taliban, claimed responsibility for the attack just hours after it happened. A spokesman for the Afghan Islamist group told officials that they were targeting U.S. military advisers.