Yemen’s Houthi rebels on Saturday broke their silence on the cause of a fire that tore through a detention centre for migrants earlier this month, killing at least 45 people, mostly Ethiopian migrants. The rebels acknowledged that guards fired three teargas canisters into a crowded hangar in the capital, Sana’a, trying to end a protest by the migrants. A statement by the rebel-run Interior Ministry said at least 11 men from the security forces were detained over the incident, along with a number of senior officials who would be tried before court. About 900 migrants, most of them from Ethiopia,...