Air strikes targeted a Syrian rebel-held area east of Damascus on Wednesday after an agreement aimed at halting the fighting there expired at midnight, the Syrian Observatory for Human Rights reported.
The Observatory also reported fighting between rebel groups and government forces in the area targeted in the air strikes in the town of Deir al-Asafir in the Eastern Ghouta.
Moscow announced on Monday the temporary truce it brokered with the United States had been extended until the end of May 3. No further extension has been declared.
In the same context, RIA news agency on Wednesday quoted General Sergei Kuralenko, in charge of Russia's ceasefire monitoring center in Syria, as saying that the situation in Syria's north Latakia, Aleppo and in the Damascus province remains "partially tense."