SANAA, Yemen (AP) — Saudi-led airstrikes hit a convoy of civilians fleeing fighting in southern Yemen early Wednesday, killing at least 31 people in an attack among the deadliest of the 3-month-old air campaign, medics said.The two airstrikes hit a convoy of civilian vehicles fleeing north from the southern city of Aden, which has seen intense fighting. Medics described a scene of carnage, with body parts scattered across the highway and smoke billowing from charred vehicles. New Year’s resolution: don’t spend another year in a kitchen you don’t like In Taiz, Houthi shelling has killed more than 30 civilians in the past 48 hours, medical officials and witnesses said. The rebels control a third of the city.All officials spoke on condition of anonymity as they were not authorized to speak to journalists.In a country already suffering from shortages of fuel, water and medical supplies, the fighting endangers hospital as well. A report released Wednesday by Human Rights Watch accused the Houthis and their rivals of turning a main hospital in Aden called al-Jumhouria into a warzone.In one incident April 19, the group said hundreds of southern fighters forced staffers to locate wounded Houthis receiving treatment there. Human Rights Watch says at least two of the wounded were shot dead outside the hospital.“The fighting in Yemen is terrible enough without both sides bringing the battle into hospitals,” said Joe Stork, deputy Middle East and North Africa director at Human Rights Watch.Copyright © The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Top Stories Top holiday drink recipes Sponsored Stories Clean energy: Why it matters for Arizona New Valley school lets students pick career-path academies Ex-FBI agent details raid on Phoenix body donation facility Here’s how to repair and patch damaged drywall Milstead says best way to stop wrong-way incidents is driving sober Comments Share Yemen’s conflict pits Shiite rebels known as Houthis — who seized the capital last year — and military units loyal to former President Ali Abdullah Saleh against an array of forces, including southern separatists, local and tribal militias, Islamic militants and loyalists of exiled President Abed Rabbo Mansour Hadi. The Saudi-led coalition backing Hadi began carrying out airstrikes on March 26.U.N.-brokered talks between the rival factions are underway in Geneva, aimed at ending the violence and addressing the humanitarian crisis in the Arab world’s poorest nation. Mediators hope for a humanitarian truce during the holy month of Ramadan starting Thursday, but neither side has shown any desire to compromise.Despite nearly three months of airstrikes, anti-Houthi forces have made little progress. The violence has killed at least 1,412 civilians and wounded 3,423, according to the United Nations.Heavy fighting was underway Wednesday in the oil and gas-rich Marib province east of the capital, Sanaa, where Sunni tribes have fended off a number of Houthi advances on the city of al-Saheel, security officials said. Airstrikes targeted the Houthis in Marib as well as in Sanaa, Aden, the rebels’ northern heartland and the western city of Taiz, they said.