“Unified and firm stances of Iranian, Turkish and Russian presidents on Aramco attacks and their serious support for the Yemeni people and condemning the other side are among most important achievements of Ankara trilateral summit,” Hessam al-Din Ashna tweeted on Tuesday in Persian.

“The unmatched role of this political convergence in security deterrence will be remembered at that historic moment,” added the head of Presidential Center for Strategic Studies.

The remarks came after Yemen’s Ansarullah movement and their allies in the Yemeni army deployed as many as 10 drones to bomb Abqaiq and Khurais oil facilities run by the Saudi state-owned oil company Aramco before dawn Saturday.

The unprecedented attack knocked out more than half of Saudi crude output, or 5% of global supply, prompting Saudi and US officials to claim without any evidence that it probably originated from Iraq or Iran.

President Rouhani said on Monday that Yemeni army’s recent drone attacks on Saudi oil facilities were merely for legitimate self-defense, and no one can expect them to remain silent when their country is destroyed. In a press conference in Ankara, Rouhani highlighted that the people of Yemen “have to respond” to the foreign aggression and the influx of US and European weapons to Saudi Arabia and the UAE.

“They cannot avoid legitimate defense when their country is being destroyed. What Yemenis do is legitimate self-defense, and reciprocal attack,” Rouhani said.

Saudi Arabia has been leading a coalition of its vassal states in waging war on Yemen since March 2015 to reinstall former president Abd Rabbuh Mansour Hadi, who resigned from presidency and fled to Riyadh in January 2015 amid popular outcry over corruption and mismanagement of the economy. Houthi Ansarullah fighters then took over state matters to prevent the country from descending into chaos.

The US-based Armed Conflict Location and Event Data Project (ACLED), a nonprofit conflict-research organization, estimates that the Saudi-led war has claimed the lives of over 60,000 Yemenis since January 2016.

The war has taken a heavy toll on the country’s infrastructure, destroying hospitals, schools, and factories. The UN says over 24 million Yemenis are in dire need of humanitarian aid, including 10 million suffering from extreme levels of hunger.