The Yemeni government said it will not participate in UN-mediated talks with the Houthi militants that were scheduled to begin this week in Oman.
The government, which was ousted by the militants in late 2014, has been staying in and acting from Riyadh for several months.
The official version of the Saba news agency quoted a statement by president Abd Rabbu Mansour Hadi as saying the government will not talk to the Houthis until they accept to implement the UN resolution No 2216.
The resolution called on the militants to cede power, withdraw from cities and return weapons they seized after ousting the government and to come back to the political dialog.
The Houthis ignored the resolution and continued the civil war with the pro-government forces triggering in late March a Saudi-led military intervention.
Hadi's statement came days after the UN envoy to Yemen Ismail Ould Cheikh revealed the government, the Houthis and the General People's Congress Party led by the former president agreed to resume talks.
The UN is pushing for the talks in an effort to end the several-months conflict which has left 80% of Yemen's population in need of emergency aid.
More than 4.000 people including hundreds of children have been killed in the conflict.
A blockade on all sea, land and air ports, part of the Arab military intervention, has deepened the suffering as it is continuing to deprive the country of all supplies.