The rebel group has made granting access to areas under their control contingent on a flurry of conditions that aid agencies reject, in part because it would give the Houthis greater sway over who receives aid, documents and interviews show.
The cases being investigated include a 2018 air strike on a school bus in the northern region of Dahyan that killed at least 40 children, and a raid on a wedding party the same year in Bani Qais area of Hajja province, which left 20 dead,
The UN Security Council called for an "immediate cessation" of hostilities in Yemen, which it said were threatening a political process aimed at ending the war.
Riyadh and its allies have grossly underestimated the strength of the Houthis.
Houthi rebels captured the vessels on Tuesday, during a lull in attacks on Saudi Arabia.
Saudi-backed Yemeni government and the UAE-supported Southern Transition Council have reached a deal to fight against the Houthis.
Two years ago, the kingdom’s young and inexperienced ruler was confident he could “get rid of” Iran from the Middle East, but now has shifted towards seeking dialogue.
"[Mohammed] Bin Salman's optimism about stopping the war is positive," says Mohamed Ali al Houthi, a member of the group's political council, a day after Saudi crown prince voiced hope for reaching a political solution to conflict.
Yemen’s Iran-backed Houthis have claimed a spectacular attack on Saudi Arabian forces raising more questions about the Saudi appetite for war.
Seven children are among those killed in twin raids by Saudi-led coalition in southern Yemen, an official and a doctor say.
The Saudi-led coalition said it had destroyed four sites used in assembling remote-controlled boats and sea mines to help protect the freedom of maritime navigation, as they launched a military operation north of Yemen's port city of Hodeidah.
The last surviving English paper in Yemen, the Yemen Observer, printed its final issue this year while only a handful of Arabic papers remain.
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