UNITED NATIONS (AP) — The U.N. Security Council is expressing disappointment at the failure of Greek and Turkish Cypriots to resume negotiations on reuniting the divided Mediterranean island and is urging both sides to agree on a way forward "as soon as possible."

Cyprus was split in 1974 when Turkey invaded after a coup by supporters of union with Greece. Only Turkey has recognized the Turkish Cypriots' independence declaration.

Negotiations on reunification have broken down.

The council urged Greek Cypriot President Nicos Anastasiades and Turkish Cypriot leader Dervis Eroglu to focus on reaching agreement on core issues which include power-sharing, private property lost during the war, and military intervention rights for Turkey.

The council made the appeals in a resolution extending the mandate of the U.N. peacekeeping force in Cyprus until July 31, 2014.