Saudi Arabia arrests Samar Badawi, a human rights activist who received the International Women of Courage Award from the United States in 2012. Badawi is to appear in court on Wednesday, according to Amnesty International. Both her brother, Raif Badawi, publisher of the "Free Saudi Liberals" blog, and former husband, Waleed Sami Abulkhair, are currently imprisoned.
During a phone call, U.S. President Donald Trump reportedly tells Saudi Crown Prince Mohammad bin Salman that the "U.S. supports Saudi Arabia in its efforts to fight terrorism" and that the U.S. will cooperate in the aftermath of the oil facilities attacks.
Two Saudi Aramco oil refineries, one in Abqaiq and one in Khurais, Saudi Arabia, are attacked by drones, resulting in massive fires. The fires are under control, according to the Saudi Arabian Interior Ministry. Houthi militants claim responsibility, saying that they used 10 drones for the attack.
More than 100 people are killed in a Saudi airstrike on a detention centre in Dhamar, Yemen, according to the International Committee of the Red Cross. Saudi Arabia says it hit a Houthi military facility used to store drones and missiles, "in accordance with international humanitarian law". Iran labels the airstrike as a "war crime".