Delegates from rival Libyan factions have proposed a new unity government for the chaotic country, after months of U.N. mediation and the rejection of a previous Cabinet proposal.

The Unity Presidential Council announced the 18-member government late Sunday in the Moroccan city of Skhirat. The council was formed after negotiations in Morocco last year, with the aim of forming a unity government.

The latest proposal needs approval from the internationally recognized parliament in the east, which rejected a proposed unity government last month. The announcement did not mention needing approval from the rival Islamist-dominated parliament in the west.

The U.S. and Europe are concerned that Islamic State extremists are taking advantage of the political vacuum in Libya.

U.N. Libya envoy Martin Kobler tweeted his congratulations, calling Sunday's announcement "a unique peace opportunity that must not be missed."