UN officials are so concerned that a special briefing for the UN Security Council has been held on the Indian Ocean tourism magnet.
The Maldives' supreme court called off a presidential runoff vote scheduled for last weekend between former president Mohamed Nasheed and Abdulla Yameen, a half brother of former strongman Maumoon Abdul Gayoom.
There have been almost daily demonstrations since.
"We continue to follow the situation in the Maldives with concern in light of the mounting tension" since the postponement of the election, said UN spokesman Martin Nesirky yesterday.
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UN Assistant Secretary-General for Political Affairs, Oscar Fernandez-Taranco, who has acted as a UN envoy to the Maldives, briefed the Security Council on Wednesday.
The UN official warned the 15-nation council that there was "a potential for trouble" and that recent democratic gains are "under threat," said a diplomat who was at the meeting.
Gayoom was the Maldives' authoritarian leader for three decades up to 2008.