Syria opposition postpones 'formal' participation in peace talks: UN envoy

Syria's opposition has postponed its "formal participation" in peace talks in protest over escalating violence, but will remain in Geneva and may continue informal discussions with mediators, the UN envoy said Monday. "I heard today from the HNC (opposition High Negotiations Committee) their intention to postpone their formal participation in the (UN offices) to the negotiations," United Nations mediator Staffan de Mistura told journalists.