SANAA, Yemen (AP) — Airstrikes in northern Yemen killed as many as nine children, a United Nations official said Friday, making it the third such attack with significant child deaths in that rebel-controlled region this month. Lise Grande, the U.N. humanitarian coordinator for Yemen, said in a statement that a group of mostly women and children were hit while they were traveling by road Thursday. She said it was “shocking and completely, totally unacceptable.” The statement said at least seven more children and two women were injured, but added that the casualty figures were only preliminary and still under investigation. The health ministry for the Houthi rebels, who control the area where the incident happened, had said Thursday that the Saudi-led coalition supporting Yemen’s government conducted six airstrikes in the mountainous northern Yemeni province of Jawf. It said a rough early count indicated more than 20 dead, mostly women and children.