A fighter aircraft from the United Arab Emirates taking part in coalition fighting in Yemen is missing, the country's armed forces said in a statement via a state news agency.
The armed forces statement said the warplane was taking part in a mission with the Saudi-led alliance was "lost" without releasing further details.
The conflict in Yemen between Houthi rebels and forces loyal to a deposed president has killed nearly 6,000 people since March this year and caused 21 million people to be in need of humanitarian aid.
Today the warring factions gathered in UN talks in Switzerland and the struggle for power appears to be on hold with a ceasefire.
With radical groups using the ongoing violence as a foothold in the Arab world, is there hope for peace in Yemen's largely forgotten war?
ITV News Correspondent Juliet Bremner reports:
Security sources and residents say the governor of Yemen's Aden province Jaafar Mohammed Saad had been killed in a rocket-propelled grenade attack on his convoy.
Several members of his entourage also died in the attack in Tawahi district of Aden city, they said.
At least 15 people have been killed and 30 others wounded by masked gunmen in an attack on a checkpoint in Yemen, officials have said.
A group of unidentified militants set off a car bomb and exchanged gunfire with government troops in the fortress city of Shibamin in the Hadramawt province.
The Yemen wing of the so-called Islamic State group has claimed they were responsible for the attack in posts on social media. That claim has not yet been confirmed.
Initial reports had suggested that the attack might be the work of al Qaeda, which controls much of Hadramawt province and has claimed previous attacks on the same checkpoint.
At least 27 people, including eight children, have been killed in an air strike on a wedding party in Yemen.
A local resident told Reuters that 12 women and seven men died in the strike on the southern village of Wahijah.
A local official put the death toll at 30.
The first blast shook the mosque before a second Islamic State bomber detonated while being chased by guards in assault in Yemeni capital.Read the full story ›
Three Westerners including two from the US and one from Britain, have been freed by Yemen's Houthi group - Washington Post .Read the full story ›
A British man who was held hostage by al-Qaeda in Yemen for 18 months is "delighted" to be home.Read the full story ›
A British national held hostage in Yemen is "safe and well" after being freed by United Arab Emirates forces, David Cameron has said.
The Briton, named by the UAE's state news agency as Douglas Robert Semple, 64, was released in a military intelligence operation.
He had reportedly been working as an engineer when he was kidnapped in February last year.
I'm so pleased for the family of the British hostage in Yemen - who has been released safe and well. Thanks to the UAE for their help.
Foreign Secretary Philip Hammond has said a British national who has been freed after being held hostage in Yemen is "safe and well".
The Briton, whose identity has not been revealed, was freed after by United Arab Emirates forces.
I'm pleased to confirm that a British hostage held in Yemen has been extracted by UAE forces in a military intelligence operation.
The British national is safe and well and is receiving support from British Government officials. We are very grateful for the assistance of the UAE.