A pair of U.N. experts has asked the United States and Yemen to account for a suspected drone strike that reportedly killed up to 15 people earlier this month. The victims were on their way to a wedding when they were apparently mistaken for an al-Qaeda convoy. In a statement, Christof Heyns, U.N. special rapporteur on extrajudicial, summary or arbitrary executions, called on the United States and Yemen to confirm their responsibility for the attack. Juan Méndez, U.N. special rapporteur on torture, said bombing an illegitimate target such as a convoy of civilians would amount to “cruel, inhuman or degrading treatment.”