"The U.S. knows the Saudi government has employed cluster bombs in its ongoing war against Shiite Muslim rebels in neighboring Yemen, but has done little if anything to stop the use of the indiscriminate and deadly weapons during what has become a human rights catastrophe in one of the Arab world's poorest countries. With watchdog groups warning of war crimes and attacks striking civilians in Yemen, the Pentagon declined to comment publicly on whether it has discussed cluster bombs with Saudi Arabia or encouraged its military to cease using them, deferring all such questions to the State Department. But a Pentagon official, speaking on the condition of anonymity, tells U.S. News "the U.S. is aware that Saudi Arabia has used cluster munitions in Yemen." "The U.S. supports the Saudi-led coalition of Arab nations battling the Houthis with an operations center in Saudi Arabia and another in Bahrain. Through them, the American military provides intelligence and logistics support as well as air tankers to help refuel the coalition's jets." (thanks Amir)