A seven-day ceasefire in Yemen will start on Monday, the day before planned UN-sponsored peace talks in Switzerland, senior officials on both sides of the civil war that has killed nearly 6000 people say.

"Based on what had been agreed upon, there will be a halt of the aggression on the 14th of this month," Houthi spokesman Mohammed Abdul-Salam told a news conference broadcast live from the Yemeni capital Sanaa.

The Houthis, allied with Iran, have been locked for nine months in a civil war with forces loyal to President Abd-Rabbu Mansour Hadi's exiled government, who are backed by air strikes and ground forces from a mainly Gulf Arab coalition led by Saudi Arabia.

The Houthis, who control most of the northern part of the country, see the Arab alliance's military operations in Yemen since March as an aggression. The alliance says it intervened in response to a request by Hadi.

Yemen's new Foreign Minister Abdel-Malek al-Mekhlafi, who will also lead Hadi's delegation to the UN talks, confirmed that the ceasefire would start on "the evening of December 14".

"We are going to the talks with serious intentions and we hope that the other side to abide by that," he told Reuters.

The United Nations has invited Hadi's government and the Houthis to peace negotiations after the two sides agreed a draft agenda and ground rules for the talks.

A previous round of peace talks in June failed to reach an agreement, with both sides accusing each other of failing to offer compromises to end the conflict. In July, the two sides observed a five-day ceasefire, in which both sides traded accusations of violating the truce.

But both sides now say they are determined to end the crisis that had devastated the country and displaced hundreds of thousands of people.