The Royal Australian Air Force (RAAF) suspends combat missions against ISIL over Syria, following Russia's threat that it would treat any aircraft from the U.S.-led coalition flying west of the Euphrates as a potential target.
Several bombings kill at least 40 people in government and Kurdish held territory across Syria, including Tartus, Homs, Al-Hasakah and Damascus. The Islamic State of Iraq and the Levant claims responsibility.
Airstrikes by Syrian or Russian warplanes on ISIL's de facto capital Al-Raqqah in northern Syria, leaves at least 39 people dead, according to the Syrian Observatory for Human Rights. Airstrikes on the city of Palmyra and nearby villages are said to have killed at least 18 ISIL militants, as the Syrian Army advance on the city.
For the first time, Russia strikes Islamic State targets in northern Syria with 3M-54 Klub (Kalibr) cruise missiles launched from a Kilo-class submarine in the Mediterranean, according to the Russian Minister of Defence, Sergey Shoygu.
The Syrian Observatory for Human Rights reports that at least 50 United States military instructors have deployed to northern Syria from Turkey and Iraq to train Kurdish forces ahead of an assault on ISIL's de facto capital Al-Raqqah.
U.K. Prime Minister David Cameron, despite deep uncertainty over how many Labour MPs will back him, is planning to stage a parliamentary vote on British military action against ISIL in Syria this week.