- Iran is invited to attend the next round of talks over Syria's future, along with the representatives from the United States, Russia, Saudi Arabia, Turkey, Britain, France, Germany, Jordan, the United Arab Emirates, and the United Nations mediator for Syria, Staffan de Mistura. The next round of the "Vienna II" meeting is expected to start tomorrow and continue Friday in Vienna, Austria.
- Talks between Iran and the five permanent members of the UN Security Council plus Germany break down without an agreement to end the eight-year-old impasse over Iran's nuclear program, after Iranian officials refused to negotiate unless preconditions including an immediate halt to UN sanctions on Iran were met.
- The leaders of Iran, Turkey and Russia meet in Ankara. They declare their commitment to achieving a "lasting ceasefire" in Syria.
- An overloaded bus carrying migrants from Iran, Pakistan, and Afghanistan crashes into a light pole on the Igdir-Kars highway in Turkey and catches fire. A second bus hits some of the ejected passengers, killing at least 17 people and wounding 36 others.
- British, American and German men are among a group of international volunteers who travelled to Afrin to fight against Turkish-led forces in north-west Syria.