Yemen's Houthi rebels wrested control of the strategic northern city of Hazm, officials on both sides of the conflict said Sunday, a major blow to the internationally recognized government backed by Saudi Arabia.

Yemen's Houthi rebels have blocked half of the United Nations' aid delivery programs in the war-torn country — a strong-arm tactic to force the agency to give them greater control over the massive humanitarian campaign, along with a cut of billions of dollars in foreign assistance, according to aid officials and internal documents obtained by The Associated Press.

Yemen's Houthi rebels have blocked half of the United Nations' aid delivery programs in the war-torn country — a strong-arm tactic to force the agency to give them greater control over the massive humanitarian campaign, along with a cut of billions of dollars in foreign assistance, according to aid officials and internal documents obtained by The Associated Press.