UN Officials Ask US to Justify Yemen Drone Massacre.

''If armed drones are to be used, States must adhere to international humanitarian law, and should disclose the legal basis for their operational responsibility and criteria for targeting,” said Christof Heyns, UN Special Rapporteur on extrajudicial, summary or arbitrary executions. “Yemen cannot consent to violations of the right to life of people in its territory,” he added.
Special Rapporteur on Torture Juan Méndez also expressed concern about the legitimacy of the airstrikes, highlighting that each State was obliged to undertake due investigation into the reported incidents, including the effect on civilians.
“A deadly attack on illegitimate targets amounts to cruel, inhuman or degrading treatment if, as in this case, it results in serious physical or mental pain and suffering for the innocent victims,” Mr. Méndez said. MORE