Yemen's Huthi rebels fire missile at Riyadh

• 136 killed in Saudi-led coalition strikes on Yemen in 10 days: UN

Saudi Arabia said yesterday it intercepted a missile over Riyadh fired by Iran-backed Huthi rebels in Yemen who announced that the target was the official residence of King Salman.

Saudi Arabia and the United States have accused Iran of supplying weapons to the insurgents, and Riyadh described the latest missile as "Iranian-Huthi".

An AFP correspondent heard a loud explosion at 1050 GMT, shortly before the scheduled unveiling of the Saudi budget, which is usually announced by the king from the Yamamah palace, his official residence.

"Coalition forces confirm intercepting an Iranian-Huthi missile," the Center for International Communication, an arm of the Saudi information ministry, said on Twitter.

"There are no reported casualties at this time," it added.

It was the second missile fired by the Huthis -- who seized the Yemeni capital in 2014 -- at Riyadh in the past two months.

The attacks, which could further escalate a military campaign by a Saudi-led coalition against the rebels, underscore how the raging Yemen conflict is increasingly spilling across the border.

Saudi Arabia angrily accused its arch foe Iran of supplying the missile to the rebels, a charge Tehran strongly denied.

The UN said yesterday at least 136 civilians have been killed over 10 days of Saudi-led air strikes on Yemen this month, with the organisation's human rights chief decrying an "inferno" on the ground.

The UN human rights office said it had tallied 136 civilians killed and another 87 injured in the strikes on Sanaa, Saada, Al Hudaydah, Marib and Taez governorates between December 6 and 16.