The UN on Monday urged Egypt, Ethiopia, and Sudan to “work together” to resolve differences over Addis Ababa’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 did not give results as expected by Egypt. However, US Black congressmen supported the Ethiopian position.

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 2015 Declaration of Principles on the dam” that stressed the need for cooperation based on good faith, international law and mutual benefit.