The United Nations is "unable to independently corroborate" that missiles and drones used in attacks on Saudi oil facilities in September "are of Iranian origin," Secretary-General Antonio Guterres told the Security Council on Tuesday.

Sudan's prime minister said on Sunday Khartoum had reduced the number of troops it has in Yemen from a peak of 15,000 to 5,000, confirming a drawdown in a conflict which he said could not be solved militarily.

The Yemeni government and southern separatists have failed to meet a deadline to establish a power-sharing government, an ominous sign for hopes of a wider deal to end years of war.

A group of Houthi prisoners released by Saudi Arabia arrived in the Yemeni capital Sanaa on Thursday, Reuters witnesses said, in a step that may encourage efforts to end a nearly five-year war in the country.

The Saudi-led coalition fighting Yemen's Huthi rebels said Tuesday it will release 200 insurgents, as efforts pick up pace to end the conflict in the impoverished country.

Yemen is now grappling with an epidemic of dengue fever, adding to its woes of war and cholera, the Red Cross said Monday.

United Nations Yemen envoy Martin Griffiths told the U.N. Security Council on Friday that the number of air strikes by the Saudi-led coalition battling Iran-aligned Houthis in Yemen has dropped nearly 80% in the last two weeks.

Yemeni Houthi movement released three vessels and 16 people it had seized, South Korea’s Foreign Ministry and a Houthi military source in Yemen said on Wednesday.

Saudi Arabia is intensifying informal talks with the Iran-aligned Houthi movement on a ceasefire in Yemen, sources familiar with the discussions said.

Saudi Arabia's vice minister of defense visited Oman on Monday and met with ruler Sultan Qaboos, Omani state news agency ONA reported, following a deal to end a power struggle in the south of Yemen.

Yemen’s Houthi movement said on Friday its air defenses downed a U.S.-made ScanEagle drone near the Saudi border, the group’s military spokesman said.

The United Arab Emirates said on Wednesday that its troops have left Yemen's southern port of Aden and returned home, handing over control to Saudi Arabia which is leading an Arab military coalition engaged in Yemen.

Yemen's government and Huthi rebels have set up joint observation posts as part of de-escalation moves in the flashpoint city of Hodeida, a move the United Nations welcomed on Wednesday.

The Houthi group in control of Yemen's capital released hundreds of prisoners on Monday in a unilateral move, which the United Nations hoped would help revive a stalled peace process after months of failed efforts to push through a prisoner swap.

Air strikes blamed on the Saudi-led coalition killed at least 16 people in Yemen's disputed province of al-Dhalea on Tuesday, two residents and the Houthi-run al-Masirah TV said.

Two flights were diverted from Dubai International Airport on Sunday due to suspected drone activity, the hub's operator said, at least the second disruption of its kind there this year.

Yemen’s Iran-aligned Houthis will stop aiming missile and drone attacks at Saudi Arabia if a coalition targeting Yemen does the same, a Houthi official said on Friday, nearly a week after the Houthis claimed a strike on Saudi oil facilities.

The Saudi-led coalition launched a military operation north of Yemen's port city of Hodeidah against what it described as "legitimate military targets", State-run Ekhbariya TV reported on Friday.

Yemen's Houthi group said on Wednesday it had identified dozens of sites in the United Arab Emirates as possible targets, in an attempt to underscore its military clout following a weekend attack it claims to have carried out on Saudi oil facilities.

At a weapons exhibition in July in Yemen's Houthi-controlled capital Sanaa, military officials whipped silken sheets off what they said were newly-developed drones and missiles.