UPDATE 1-U.N. Syria envoy Staffan de Mistura to step down at end of November

United Nations Syria envoy Staffan de Mistura told the Security Council on Wednesday that he plans to step down at the end of November for personal reasons after more than four years in the role.

He is the third person to fill the job during the more than seven-year Syrian conflict. His predecessors - former U.N. Secretary-General Kofi Annan and veteran Algerian diplomat Lakhdar Brahimi - both quite frustrated by a global deadlock over how to end the Syrian war.