Two bombs attached to a military bus detonate as it passes under Jisr al-Rais bridge in Damascus, killing 14 people. Minutes later, military shellfire kills at least 10 civilians in Ariha, Idlib Governorate.
Israeli warplanes fire missiles near Damascus, Syria. A pro-opposition war monitor says army positions and Iran-backed militias are targeted, killing 12 fighters. Syria says eight fighters are wounded and Israel intends to "save the armed terrorist organisations which have been collapsing in Idlib and western Aleppo Governorate in front of the strikes of the Syrian Army".
Turkish President Recep Tayyip Erdoğan says Turkey will not allow Syria's military to gain more ground in the rebel-held Idlib Governorate, as the Syrian Army captures several more villages near the city of Saraqib. Turkish officials say intermittent clashes between Turkish and Syrian troops have continued since Monday.
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".
The Syrian Army, backed by Russian Air Force support, enters the largely deserted city of Ma'arrat al-Nu'man in the northern Idlib Governorate. Only light resistance is reported as most rebel groups, including Hayat Tahrir al-Sham, withdrew their fighters. The city had been under rebel control since October 2012.
The Syrian Army continues its offensive in southern Idlib Governorate towards the key rebel-held city of Ma'arrat al-Nu'man, capturing several towns and villages, including Jarjnaz and Sarman. Around 30,000 civilians have fled the area in recent days, according to the Syrian Observatory for Human Rights.
Sky News journalist Alex Crawford and her media team are fired on by Syrian Army tanks in the Tahrir al-Sham-held village of Hbit, Idlib Governorate, while covering the fighting there. Their guide, Bilal Abdul Kareem, is injured by shrapnel to his chest.
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.