The Houthi movement, a collection of Yemeni Shiite militias supported by Iran, claimed responsibility for the attack. A Houthi movement spokesman said on Sunday that the attacks had been carried out with the use of modified commercially available drones. He also warned that Saudi Arabia would experience more attacks of this kind in the future. Iran has rejected accusations by American and some Saudi officials that it was responsible for the attacks.

On Monday the Reuters news agency reported that the US is considering the possibility of drastically increasing the volume and quality of intelligence it shares with Saudi Arabia. The move is allegedly intended as one in a series of measures to be taken by Washington in response to Saturday’s drone attacks. In the past, the US has been selective in how much intelligence it shares with the Saudis, who have been involved in an increasingly bloody civil war in Yemen since 2015. Washington is weary of being seen to have a decisive role in support of the Saudi-led military campaign in Yemen, in light of the criticism that the latter has drawn from numerous international bodies and governments around the world.

The US Congress has also condemned the Saudi campaign in an unusually bipartisan fashion, and has tried to stop President Donald Trump from providing material support to it. In May of this year, the US president defied Congress and signed two dozen arms sales agreements worth over $8 billion with the oil kingdom. The move upset many critics of Saudi Arabia in the Republican Party, who sharply criticized the Saudi government for killing journalist Jamal Khashoggi inside the Saudi consulate in Istanbul, Turkey, last year. A possible decision by Washington to increase its intelligence sharing with Saudi Arabia is bound to prompt a critical response from Congress, especially if it relates to the ongoing war in Yemen.