Iran's Supreme Leader Ayatollah Ali Khamenei was killed in the U.S. and Israel's ongoing attacks. The Iranian government has announced 40 days of public mourning. A temporary leadership council is expected to be formed until the next leader is selected, according to Iran state-run IRIB TV. Meanwhile, the Islamic Revolutionary Guard Corps has vowed to take revenge against those responsible for the leader's death and said it has launched attacks on at least 27 bases hosting U.S. troops in the Middle East, as well as Israeli military facilities in Tel Aviv. The United Nations' nuclear agency will hold an extraordinary meeting on Iran on Monday. Stay with CGTN for continuing live coverage.