Houthi rebels in Yemen say they have shot down a Moroccan fighter jet that was taking part in Saudi-led coalition air strikes against them. Rebel-controlled Al-Masirah TV reported that the F-16 was hit as it flew over Saada province, and broadcast pictures of what it said was the wreckage. The Moroccan Royal Armed Forces earlier said one of its planes was missing. If confirmed, it would be the first aircraft lost by the coalition since its air campaign began on 26 March. The bombardment has been stepped up in recent days ahead of the start of a proposed five-day humanitarian...