Saudi-led coalition Thousands of Yemenis protest a blockade on Yemen led by a Saudi Arabian coalition.
Cabinet of Donald Trump U.S. President Donald Trump selects Eli Lilly's American division president and former HHS deputy secretary Alex Azar to be Secretary of Health and Human Services, replacing Tom Price who resigned on September 29.
Russia–United States relations RT America registers with the U.S. Department of Justice as a foreign agent in the United States.
Peace talks The Foreign Affairs Ministers of the European Union unanimously vote to remove the Revolutionary Armed Forces of Colombia (FARC) from its list of designated terrorist groups.
Military of the European Union Twenty-three European Union countries sign a defence integration pact known as the Permanent Structured Cooperation. NATO members Denmark, Portugal and the United Kingdom (withdrawal from EU underway), and non-NATO members Malta and Ireland, opt out.
2017 Iran–Iraq earthquake The death toll from the earthquake in Iraq and Iran exceeds 400 with over 7,000 injured. The death toll is expected to rise further in coming days.
Syrian civil war The BBC reveals that a secret deal in mid-October allowed hundreds of ISIL fighters and their families, including some of their "most notorious members", escape from Raqqa in a convoy that was between 6 to 7 km long. The United States government confirms that the deal with ISIL was made and that the evacuations took place. The possibility of a deal was previously reported as early as October 14.
Border incidents involving North Korea A Korean People's Army soldier defects to South Korea via the Korean Demilitarized Zone (DMZ). He was shot and injured by fellow North Korean soldiers as he crossed to the South Korean side at Panmunjom, and has been taken to hospital.