By Michele Kambas NICOSIA (Reuters) - Greek and Turkish Cypriot leaders on Cyprus agreed on Thursday to open further crossing points linking the two parts and to merge their electricity networks, a UN envoy said. Nicos Anastasiades, the Greek Cypriot leader, and Turkish Cypriot leader Mustafa Akinci also agreed to look at ways of linking mobile telephone grids, UN adviser Espen Barth Eide said. "Mr. Akinci and Mr. Anastasiades underlined once again their shared will and determination to reach a comprehensive settlement," Eide told reporters after a meeting with the leaders in Nicosia.