UNITED NATIONS, Dec. 8 (Xinhua) -- The United Nations Security Council on Thursday welcomed the signing of a framework deal in Sudan to end political stalemate, and called on key political forces in the country to join the political process.

Sudan's military and civilian leaders on Monday signed a political framework agreement to end the political impasse and institute a two-year transitional civilian authority.

In a press statement issued Thursday, the 15-member Security Council welcomed the signing of the deal, calling it "an essential step" towards the forming of a civilian-led government and defining constitutional arrangements to guide Sudan through a transitional period culminating in elections.

The council members "stressed the importance of establishing a conducive environment for resolving outstanding issues through a peaceful and inclusive dialogue," the statement said.

They also underscored the need for continued confidence-building measures and strongly encouraged key political forces that have not yet signed the agreement to join the political process, and emphasized the importance of providing them with further opportunities to do so, it added.

The council members encouraged the parties to start work without delay on the second phase of the process, including to address critical issues envisaged by the signatories to the framework agreement that foster peace and security in Sudan, said the statement.

They emphasized that a concerted effort to finalize negotiations and reach agreement on the formation of a civilian-led transitional government "was essential to address Sudan's urgent humanitarian and economic challenges," the statement said.