SANAA, May 21 (Xinhua) -- Yemen's Houthi rebels said they launched a drone attack on an arms depot at Najran airport in the Saudi Arabia's border city of Najran, the group TV al-Masirah reported on Tuesday morning.
"The attack was carried out by Kasif-K2 drone which caused a fire to break out in the facility," it said.
Meanwhile, the Saudi-led coalition's spokesman Colonel Turkie al-Maleki said a vital civilian facility in Najran was targeted with a drone carrying explosives, Saudi-owned Al Arabiya television reported.
"There will be a strong deterrence against the Houthi militias in accordance with the international humanitarian law," Al Arabiya TV quoted al-Maleki as saying.
The coalition's spokesman did not mention casualties.
The attack came a day after Saudi Arabia said it's forces had intercepted and destroyed "ballistic missiles" above the Saudi western cities of Jeddah and Taif.
Houthis have been targeting Saudi border cities since the beginning of the war in Yemen.
On Sunday, the Iran-allied Houthi rebels vowed to strike 300 vital military targets inside Saudi Arabia and the United Arab Emirates (UAE). The Houthi rebels said they would halt their attacks once the Saudi-led coalition halts its military operations inside Yemen.
Last week, the Houthi drone attacks damaged two Saudi oil pump stations and caused limited fire, according to Al Arabiya television.
The Saudi-led coalition has been intervening in the civil war in Yemen since 2015 to support the Yemeni exiled government against the Houthi rebels who seized Yemen's northern provinces, including the capital Sanaa.