Saudi Arabia extends closure of Riyadh airport, issues emergency alert

Riyadh's international airport remains shut and airlines scrapped flights after it was hammered by a string of deadly attacks that drew condemnation from the United Nations general-secretary.

Saudi authorities say they responded to and intercepted another Houthi ballistic missile launched towards Riyadh, and issued fresh emergency alerts about potential threats.

Saudi civil aviation authorities have extended the suspension of operations at King Khalid International Airport this week to allow for the "completion of procedures to ensure the safety and operational readiness" of facilities.

A notice to airmen shows it will stay closed until 2100 GMT on October 17.

At least 13 people died and more than 300 others injured from a Saturday Houthi attack on a passenger terminal, the deadliest in the kingdom in over a decade.

A separate attack on Sunday killed another person and wounded nearly a dozen others.

On Monday, Houthis claimed attacking the airport with a ballistic missile, after Saudi Arabia said they intercepted and destroyed a missile fired by the group towards Riyadh.

The Saudi civil defense ministry issued its first alerts since September 29 to warn against potential threats in the capital and cities in the south.

This as the Saudi-led coalition pledges to provide more air support for Yemen's pro-government forces on the Red Sea coast.

Houthis say the coalition airstrikes on two sites in Sanaa and northern Yemen have killed 10 people and wounded 19.

Explosions are heard in Marib where the Yemeni military continues to exchange fire with Houthi fighters.

Both sides have released footage showing troops and tanks moving through the desert, burned vehicles on the front lines.

Meanwhile Riyadh's Governor, Prince Faisal bin Bandar, paid a visit to the hospital where some of those injured from the airport attack were undergoing medical treatment.

He inquired about their health, wished them a speedy recovery and checked with doctors about their conditions.

A UN spokesperson says General-Secretary Antonio Guterres strongly condemns the continued Houthi attacks on Saudi Arabia, especially its civilian infrastructure, and remains "deeply concerned" about the escalation inside Yemen.

The UN urges all parties to exercise constraint and uphold their obligations under international humanitarian law and to take constant care to spare the civilian population.

US President Donald Trump confirms speaking to Saudi Arabia's Crown Prince Mohammed bin Salman about the situation, and says the Houthis are misbehaving "badly." "The Houthis are misbehaving very badly. They're misbehaving very badly, no good," he says. "I don't know how it affects the election. I don't take that into account. I just know Iran will never have a nuclear weapon."