12 people died and more than 300 were injured in Saturday's attack on King Khalid International Airport in Riyadh, Saudi Arabia

While the group hasn't taken responsibility for the attack on Riyadh's International Airport, the Houthis have issued a warning against using any of Saudi Arabia's airports.

The group did, however, take responsibility for the attacks on October 8 that killed three Saudi Arabian nationals at the same airport, claiming they used cruise missiles.

On Sunday, the Yemen Houthi group warned aviation firms and passengers from using Saudi airports and airspace, but didn't refer directly to Saturday's attack.

Speaking on the attacks with The Pat Kenny Show, Sky News Middle East Correspondent Adam Parsons shared how he would be very surprised if Saturday's attack wasn't carried out by the Houthis.

He explained: "I think it would be very, very surprising if this was [carried out by] anyone other than the Houthis, not least because the Houthis have put out a statement warning people away from entering Saudi airspace or using Saudi airports.

"So although they haven't directly taken responsibility, there is a vanishingly small number of people who would want to attack the airport in Saudi Arabia's capital."

Considering Saudi Arabia is the world's number eight net spender on defence and if you look per capita, it's number three in the world, questions are being asked as to why these attacks are getting through.

Mr Parsons continued: "Saudi Arabia spends a lot of money on weapons, spends money on air defence systems, and it is struggling to cope with the weaponry of the Houthis.

"Now, I think it's sometimes people stereotype the Houthis as being a sort of rag tag bunch of ill-funded rebels. In fact, they have got some fairly sophisticated weaponry and they're very experienced fighters.

"But if I were a Saudi, I'd be pretty worried about why infrastructure keeps being hit. The truth is, in modern weaponry, if you're firing it from not far away, which can be the case with the Houthis firing into Saudi Arabia, then it's tough for air defence systems to cope with that.

"But nevertheless, you are not alone in raising the spectre of how it is that such an incredibly sophisticated, well-funded military is struggling to cope."

In the aftermath, Kuwait Airways have suspended flights into Riyadh, but at the time of publishing, other Saudi Arabian airports are still open.

However, embassies are telling citizens to avoid the airports and international airlines have cancelled flights, though you can get into and out of Saudi Arabia in other ways.

"It's clearly a country that is nervous at the moment as education is being done remotely," Mr Parsons added. "And I think it's telling.

"I'd also say that normally when these things happen, you see a huge amount of user-generated content coming out from attacks like this. Relatively little has come out here.

"Saudi citizens, to be blunt, know that their government does not want them to put out anything which shows this attack happening."

Main image: Saudi Crown Prince Mohammed bin Salman Pic: Bandar Al Jaloud - Royal Palace / ABACAPRESS.COM