Syrian Army shelling kills Turkish military personnel in Idlib Governorate, prompting retaliation by Turkish forces. A pro-opposition war monitor says the Turkish retaliation killed 13 Syrian soldiers, which Syria denies. The Russian Ministry of Defence says Turkey moved troops "inside the de-escalation zone [...] without notifying the Russian side". Turkish President Erdoğan says the Syrian shelling killed five Turkish soldiers and three civilian personnel, with nine others injured, and that the Russians "need to stand aside".
Two shells hit the Russian embassy in Syria's capital Damascus, as hundreds of pro-government supporters rallied outside in support of Russian airstrikes. Russian Foreign Minister Sergey Lavrov described the shelling as "a terrorist act."
Following Russian airstrikes, the Syrian army and allied Lebanese Hezbollah militia take control of a highland area in Idlib province close to insurgent-held positions, according to the Syrian Observatory for Human Rights.
Saudi Arabia and other Gulf Arab states are reportedly 'stepping up' arms supplies to at least three Syrian rebel groups in response to the recent Russian intervention in the civil war.