Protesters linked to anti-government Houthis have pelted the motorcade of the U.N. envoy to Yemen with rocks, shoes and eggs as the Mauritanian diplomat was leaving the airport at the capital, Sana’a. The envoy, Ismail Ould Cheikh Ahmed, was not hurt in the Monday incident. His bodyguards fired in the air to disperse the small group of protesters. The Untied Nations has been seeking to mediate a political settlement in Yemen to end a war pitting forces loyal to the country’s internationally recognized government and backed by a Saudi-led coalition against Iranian-backed Houthis, and loyalists to a former president. The war has killed more than 10,000 civilians and led to the displacement of some 3 million Yemenis.