On the morning of the 20th local time, Riyadh issued an air-raid alert; loud explosions were heard shortly after.

Iran Foreign Ministry spokesman BAGHAEI said Egypt’s readiness to assist Saudi Arabia in the conflict with Houthi forces worsens the situation.

Russian Foreign Minister Lavrov, on a visit to Tehran, said Moscow does not intend to abandon economic and investment agreements with Iran and that Russian technical experts are returning to the Bushehr nuclear power plant in southern Iran. He told a joint press event that bilateral trade rose 21% last year and by more than 10% in the first eight months of this year, and said the two countries have wide prospects for cooperation in oil and gas extraction and transport. Bushehr, on the Gulf coast, is Iran's only operating nuclear power plant.