A UN peace plan for Yemen calls on the Houthi movement to give up its ballistic missiles in return for an end to a bombing campaign against it by a Saudi-led coalition and a transitional governance agreement, according to a draft of the document and sources.

The plan, which has not yet been made public and could still be modified, is the latest effort to end Yemen’s three-year-old civil war, which has spawned one of the world’s worst ongoing humanitarian calamities.

The conflict pits the Iran-aligned Houthis, who took control of the capital Sanaa in 2014, against other Yemeni forces backed by a coalition led by US allies Saudi Arabia and the United Arab Emirates.

Previous efforts to end the conflict, which according to the United Nations has killed more than 10,000 people, have failed. It is unclear whether the new plan will fare any better given the divergent interests of fighters on the ground and international backers.

A draft document confirmed by two sources familiar with it says that as a step toward new security arrangements, “Heavy and medium weapons including ballistic missiles shall be handed over by non-state military actors in an orderly and planned fashion.”

“No armed groups shall be exempt from disarmament,” it says.

The document also cites plans to create a transitional government, in which “political components shall be adequately represented,” in an apparent nod to the Houthis, who would be unlikely to cede Sanaa without participation in a future government.

“The intention is to link security and political aspects starting with a cessation of fighting...then to move towards a withdrawal of forces and the formation of a national unity government. This last objective could possibly be the hardest,” one of the sources said.

The peace plan was drafted by special UN envoy Martin Griffiths, who is due to present a “framework for negotiations” in Yemen by mid-June.

The political forces in war-torn Yemen are ready to embrace a political solution. Both President Abdrabbuh Mansur Hadi and the leadership of the Houthi rebels have expressed their willingness to end the war, said Martin Griffiths at the UN Security Council meeting on Yemen on April 17.

A political solution is the only way to achieve lasting peace in Yemen, said Wu Haitao, China’s deputy permanent representative ambassador, in response to Griffiths’s briefings, the same day.

The international community should continue to support Yemen’s sovereignty, independence, unity and territorial integrity, Wu said, adding that it is imperative to support the meditation efforts of the United Nations, on the basis of the relevant UN Security Council resolutions, the Gulf Cooperation Council Initiative, its Implementation Mechanism and the National Dialogue Conference outcome documents, and engage in dialogue and negotiations in order to reach an inclusive settlement to the issue as soon as possible,.

Anwar Gargash, the UAE’s minister of state for foreign affairs, signaled Abu Dhabi’s desire to support Griffith’s efforts.

“Politically, there is a necessity to back the UN effort. It will ultimately mean a transition, to a new political order in Yemen. Clearly with the UN effort, the military and political process will see the Houthis pull out of urban centers,” he told UAE English-language newspaper The National.