President Donald Trump spoke by telephone with retired Major General Khalifa Hafer on Monday, the White House said in a statement, adding that the talks dealt with "ongoing efforts to combat terrorism and the need to bring peace and stability to Libya."

Trump "recognized the role of the pivotal mover in combating terrorism and securing Libya's oil resources, and shared a vision of Libya's transition to a stable democratic political system," the statement said.

The United Nations Security Council, in a meeting on Thursday to discuss the situation in Libya, failed to reach a clear strategy to demand a rapid cease-fire by the belligerents. The United States and Russia oppose a British draft resolution condemning Haftar.

The UN envoy to Libya Ghassan Salama said that the government of national reconciliation in Tripoli is the only legitimate government in the country, and coordination with them on a daily basis.

Salameh also condemned in the strongest terms the heavy rocket fire on residential neighborhoods in Tripoli. "The use of indiscriminate and explosive weapons in civilian areas constitutes a war crime," he said.