Six members of the Turkish-backed Ahrar al-Sham Syrian rebel group have been killed in an explosion in north-western Syria, as Turkey said it had ‘neutralised’ five Kurdish fighters.
An Assad regime-allied militia has bombed a regime headquarters in Daraa in revenge for the arrest of three militiamen, while two regime soldiers were killed in separate incidents.
Faisal Mekdad will be replaced as deputy foreign minister by Syria's ambassador to the United Nations, Bashar Jaafari.
In-depth: Five years have passed since Russia's intervention in Syria's war began.
Syrian rebels have bombed regime positions in the northwest of the country in retaliation for a Russian airstrike which killed up to 100 fighters.
The Syrian Islamist Ahrar Al-Sham rebel group is facing a major split between it political leadership and its military wing, which the Hay’at Tahrir Al-Sham group is encouraging.
In-depth: Five years have passed since Russia's intervention in Syria's war began. For Syrians, it is a time of loss and mourning.
Russia's intervention in the Syria war has cost thousands of lives.
Despite a reduction in violence, Syrians remain subject to 'gross' human rights violations, a UN commission has said.
At least 28 fighters were killed in clashes between Syria pro-regime forces and Islamic State militants in the northern province of Raqqa.