The UN secretary-general has condemned escalating violence between Houthi rebels and the Saudi-led coalition, after a week of retaliatory attacks. “The secretary-general is deeply concerned about reports of ongoing airstrikes in Hodeidah city and the targeting of Hodeidah’s ports, which provide a critical humanitarian lifeline for the Yemeni population,” the UN chief’s spokesperson, Stephane Dujarric, said in a statement on Sunday. The statement also condemned “Friday’s aerial attacks on civilian and energy facilities in Saudi Arabia by the Houthis”, calling for both sides to “immediately dees…