A major blackout is reported in Syria after an explosion hits the Arab Gas Pipeline in the Rif Dimashq Governorate. Syrian Oil Minister Ali Ghanem says the explosion was a "terrorist attack", but does not elaborate on who was behind it.
The Obama administration claims that Russia was responsible for the bombing of a United Nations aid convoy near Aleppo on September 19. Russia denies its involvement. In the aftermath of the attack, the United Nations suspends all aid convoys in Syria.
Turkey says that it has reached an in-principle deal with the United States to give support to some elements of Syrian opposition. Over a million Syrian refugees live in Turkish territory, including many Syrian opposition figures.