"Over the past day, insurgents attacked Rois-Usleyman in Latakia province and western outskirts of Aleppo city," the statement read.
The center once again called on militants operating in Idlib de-escalation zone to join the truce.
READ MORE: Ceasefire Breaches Recorded in Syria's Idlib Safe Zone — Russian Military
Syria has been in a state of civil war since 2011, with the government forces fighting against numerous opposition groups and terrorist organizations. Russia along with Turkey and Iran are guarantors of the ceasefire regime in Syria.