On Monday the perpetrators of chemical-weapon attacks must be identified and held accountable for their actions, UN Secretary-General Antonio Guterres said
His comments came as he opened the second session of the Conference on the Establishment of a Middle East Zone Free of Nuclear Weapons and Other Weapons of Mass Destruction.
Currently, 60 percent of UN member states are covered by five nuclear weapon-free zones in Latin America and the Caribbean; the South Pacific; Southeast Asia; Africa; and Central Asia. Guterres said that expanding these zones would lead to more robust disarmament and non-proliferation norms.