Summary
Saudi Arabia, which is leading air strikes against rebels in neighboring Yemen, has warned the United Nations and international aid groups to protect staff by removing them from areas held by Yemen's Houthi rebels, a letter seen by Reuters on Thursday said.
It was not immediately clear why Saudi Arabia issued the warning and how many aid groups aside from the United Nations, received the note.
U.N. aid chief Stephen O'Brien acknowledged receipt of the note in a Sunday letter seen by Reuters and said the humanitarian community would continue to deliver aid across Yemen impartially on the basis of need.
He reminded Saudi Arabia of obligations under international humanitarian law to facilitate access for aid.
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