Israeli airstrikes on Iranian weapons and missile depots near Damascus, Syria, kill six foreign nationals, according to the Syrian Observatory for Human Rights. The headquarters of the Syrian Army's 4th Armoured Division is also hit.
Israel carries out a wave of airstrikes on Syria's eastern Deir ez-Zor Governorate, near its border with Iraq. The Syrian Observatory for Human Rights reports that 57 people have been killed and 28 others injured in at least 18 Israeli airstrikes, saying that several Iranian arms depots were hit. A senior U.S. intelligence official says that the air raids were carried out with "intelligence provided by the U.S."
The Syrian Observatory for Human Rights reports that suspected Syrian government or Russian warplanes conduct a series of air raids on Oqayrabat and other nearby villages in the Hama Governorate at dawn, killing at least 34 civilians, including 11 children.
Between four and 20 people are reported killed by government and Russian airstrikes that hit rebel held areas, five hospitals, and a mobile clinic in Aleppo, says U.S. State Department spokeswoman Elizabeth Trudeau. Syria and Russia deny targeting Aleppo.
The British-based Syrian Observatory for Human Rights reports U.S.-led coalition airstrikes on the Islamic State-held city of Manbij in northern Syria kill at least 56 civilians, including 11 children, and injure dozens more.
The Syrian Observatory for Human Rights reports the al-Nusra Front's spokesperson Abu Firas al-Suri was among 20 militants killed in a suspected Russian airstrike on a village near the city of Idlib in northwestern Syria.
A Syrian Arab Air Force or Russian airstrike reportedly kills a dozen people at a market selling diesel fuel in the rebel-held Idlib Governorate. The Syrian Observatory for Human Rights says the death toll is likely to rise.
Russian airstrikes on an Al-Nusra Front (Al-Qaeda's branch in Syria)-run prison complex in the northern town of Maarrat al-Nu'man, Idlib, leaves nearly 60 people dead. Most of those killed were rebels imprisoned by Al-Nusra, according to the Syrian Observatory for Human Rights.
Syrian rebels fire volleys of mortar shells into Damascus, killing three people and wounding at least 30. Government forces respond with airstrikes into rebel-controlled Douma, just northeast of the capital, and surface-to-surface missiles into Eastern Ghouta and Saqba, that kill at least 35 people and injure many more, according to the Syrian Observatory for Human Rights.
Syrian troops and allied militia backed by a fresh wave of Russian airstrikes and naval cruise missiles attacked rebel forces as the government extended an offensive to recapture territory in central and northwestern Syria.