.@StateDeptSpox: The Presidents of the U.S. & Russia agreed in Da Nang to de-escalate the conflict. This agreement must be enforced and respected. Russia has declared to the world and to the UNSC that it will “guarantee” ceasefires in its self-declared de-escalation zones. #Syria

— U.S. Embassy Syria (@USEmbassySyria) May 26, 2018