Raqqa was captured two years ago by US troops and their YPG/PKK allies but since US President Trump abruptly ordered a pull-out in October, Moscow has swiftly advanced into that territory.
At least 96 fighters have been killed over 48 hours in Idlib during clashes between the two sides, a war monitor said. Meanwhile, Russian air strikes killed at least 14 civilians in Maarat al Numan and Saraqib.
Syria is the battleground where the new order for the Middle East will emerge.
The warning from Foreign Minister Mevlut Cavusoglu comes a day after a Turkish military convoy was targeted by an air strike in northwest Syria, killing three civilians.
Following attacks, Ankara has retaliated with a measured response and warned the regime of severe 'punishment' if its forces are targeted again in future.
War monitor said that Syrian regime forces and insurgents fought fierce battles that left dozens dead in the country's northwest, as the regime tried to regain control of two villages they lost earlier this month.
The leaders of Turkey, Russia, Qatar, China, and Iran arrived for Asian cooperation summit in Tajikistan, where Turkish President Recep Tayyip Erdogan urged the world to respect UN resolutions and the historical and legal status of Jerusalem.
The reconstruction of Syria will be another battle with rival powers trying to stamp their authority over the country through their chequebooks.
Health facilities are hit, diplomatic efforts are failing, and thousands are fleeing. The Damascus regime and its Russian allies attack northwest Syria.
Fresh killings come as rebels launch counter-offensive in western Hama province to recapture areas they lost on Thursday to regime forces. Meanwhile, aid groups suspend activities in embattled northwest.
Trapped civilians fear the Syrian regime is destroying vital facilities, including hospitals and rescue organisations, to clear the way for brutal ground assaults.
Top EU sources told TRT World the differences between Bashar al Assad and the armed opposition over the nature of the constitutional committee have been narrowed down.
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