REUTERS/David Mdzinarishvili
From U.N. headquarters:
The President of the Security Council wishes to inform the members of the Council that a public meeting in connection with the agenda item "Letter dated 28 February 2014 from the Permanent Representative of Ukraine to the United Nations addressed to the President of the Security Council (S/2014/136)" will be convened today at 3.30 p.m.
Russia has reportedly requested the meeting.
Russia's Black Sea Fleet has reportedly given Ukrainian forces in Crimea an ultimatum to surrender by midnight ET on Tuesday or face a military assault.