Saudi Arabia came under a missile and drone attack from Iran-backed Yemen rebels that targeted the capital, Riyadh, and other cities, state-run Saudi Press Agency reported.

Efforts to propel peacemaking in Yemen have been complicated in recent months by infighting between forces loyal to Hadi’s internationally recognized government and the separatist Southern Transitional Council backed by the United Arab Emirates. The Saudi-led coalition has called on the sides to cease fire and implement a planned power-sharing deal that unraveled amid the fighting, a move that would not only ease the bloodshed in Yemen but also mend a rift between the kingdom and its top Gulf ally, the UAE.

The Yemen government has welcomed the Saudi cease-fire appeal. Earlier this week, a Hadi aide called the Saudi-led intervention in his country’s civil war a failure, the first time a senior Yemeni official has asserted that publicly. The conflict has created one of the world’s worst humanitarian crisis and burdened efforts to deal with a coronavirus outbreak.

A bipartisan group of U.S. senators asked Secretary of State Michael Pompeo this month to pressure Saudi Arabia and Hadi to accept a United Nations push for a broad cease-fire and political talks to end the conflict.