Riyadh: A Saudi Arabian border guard was killed and 10 others wounded when their observation post came under fire from a mountainous area in Yemen, the Interior Ministry said on Thursday in comments carried by state news agency SPA.

Corporal Salman Ali Yahya Al Maliki, who was killed in the border province of Asir, is the first known Saudi fatality in the week-old military campaign the country has led against Al Houthi fighters in Yemen.

Aden palace captured

Meanwhile, Al Houthi rebels had reportedly captured the presidential palace in Aden late on Thursday, according to an AP report.

Yemeni security officials were quoted as saying that the rebels and their allies have captured the presidential palace in Aden following heavy clashes in the commercial center of this southern coastal city.

Thursday's capture came despite week-long airstrikes in Yemen by a Saudi-led coalition trying to halt the advance of the rebels.

Aden's Maasheeq palace is a cluster of colonial-era villas perched atop a rocky hill that juts into the Arabian Sea. The palace was President Abed Rabbo Mansour Hadi's last seat of power before he fled to Saudi Arabia last month amid the Houthi advance.

The officials spoke on condition of anonymity because they were not authorised to speak to the media.