Ethiopia, June 23 -- The UN on Monday urged Ethiopia, Egypt, and Sudan to "work together" to resolve differences over Ethiopia's Nile River mega-dam which has been a long-running source of regional tension.

At Egypt's request, the Security Council was scheduled to hold an informal videoconference Monday afternoon to address the dispute.

Recent talks failed to produce a deal on the filling and operation of the Grand Ethiopian Renaissance Dam, which will be the largest hydropower plant in Africa.

"We urge Egypt, we urge Ethiopia and Sudan to work together to intensify efforts to peacefully resolve outstanding differences," UN spokesman Stephane Dujarric said during his daily press conference.

Dujarric recalled, "the importance of the 20...