Earlier this week, the House Rules Committee advanced an amendment by California Democratic Reps. Ro Khanna and Barbara Lee that would require the Department of Defense to investigate whether U.S. allies in Yemen were involved in torturing detainees and if U.S. personnel had any role in the interrogations. The measure was adopted unanimously on the floor by a voice vote on Thursday.

An investigation by the Associated Press last year revealed a network of 18 clandestine prisons across south Yemen that are run by the United Arab Emirates – the U.S.'s primary ally in fighting Al Qaeda in Yemen – or by Yemeni forces controlled by the UAE. The investigation found that nearly 2,000 Yemenis had been disappeared into prisons where severe torture techniques were the norm, including a "grill" in which "the victim is tied to a spit like a roast and spun in a circle of fire."