Three senior Yemeni politicians say a United Nations peace conference set to take place at the end of the month has been indefinitely postponed.

The talks, scheduled in Geneva for May 28, were an attempt to reach a political settlement and end the country's armed conflict between Shiite rebels known as Houthis and Yemen's embattled internationally recognized government now in exile in Saudi Arabia.

Three officials from Houthi, socialist and unionist parties said late Sunday they were notified about the postponement and that no new date had been set. They spoke on condition of anonymity because they were not authorized to speak to journalists.

Houthis backed the talks, though Yemeni President Abed Rabbo Mansour Hadi had demanded the rebels withdraw from cities they seized before going to the talks.