Turkey and Syrian Kurdish forces are both accusing each other of violating a temporary ceasefire agreement in northern Syria.
The US announced on Thursday it had brokered a five-day pause in fighting to allow Kurdish forces to withdraw.
Turkey has agreed to a temporary ceasefire to allow Kurdish-led troops to withdraw from northern Syria.
The country will pause its offensive in the area, overseen by the US, for 120 hours in order to allow for the pullback.
Russia has stepped up its role in the conflict in Syria by deploying military police to the country’s north.
The Russian units are patrolling a contact line between Syrian and Turkish forces, according to a statement Tuesday by Russia’s Defense Ministry. The line runs along the northwestern borders of the Manbij district.
Units of the army entered on Monday evening Manbij city in Aleppo north-eastern countryside.
Earlier, the Syrian Arab Army entered a large number of villages and towns in the southern, southwestern and northern countryside of Raqqa, al-Tabqa city and its countryside and al-Tabqa military airport, SANA reporter said.
Syria’s army have begun advancing towards the Kurdish-controlled northern towns of Kobani and Manbij on Sunday, the Kurdish-led administration of northeast Syria said, after the Syrian Democratic Forces (SDF)and Damascus negotiated a deal to prevent further Turkish advances in the area.
With Operation Peace Spring, Turkey aims to clear its border with Syria, to settle the Kurdish-majority area with up to three million, mostly Arab refugees in what opponents call demographic re-engineering.