Russia says, a UN Security Council endorsement of a Syria ceasefire deal between Moscow and Washington appeared unlikely as US does not want to share the documents with the 15-member body. Russian UN Ambassador Vitaly Churkin said US is refusing to give the documents detailing the agreement to members of the Security Council. The US mission to the UN said it could not agree with Russia on a way to brief the Council that would not compromise the operational security of the arrangement. Vitaly Churkin and U.S. Ambassador Samantha Power had been due to brief the Council behind closed-doors Friday but the meeting was cancelled at the last minute.