Rival factions in Yemen have continued to trade blame over violating a UN ceasefire which came into effect at the start of this month and a failure to reopen the country’s main airport in the capital Sanaa. Iranian-backed Houthi rebels, who overran Sanaa in 2015 and forced the internationally recognised government to flee to Aden, accused the Saudi-led coalition of obstructing the implementation of the truce by not reopening the Sanaa International Airport. Houthi spokesperson Mohammad Abdelsalam on Tuesday accused the coalition of “intransigence and disavowal,” calling on the UN to ensure imp…