The Syrian Observatory for Human Rights has reported that 40 air strikes were launched on the Eastern Ghouta of Damascus on Saturday.
An amateur video posted to the internet purported to show a military plane flying over Arbin with heavy smoke rising from a building.
Six people were reportedly injured in that town after it was hit by at least 10 air strikes.
Other clips posted online by the civil defence group known as the White Helmets, seemed to show their members helping wounded people in Arbin and Harasta after the purported air strikes.
The United Nations says about 400,000 civilians besieged in the Eastern Ghouta area, face complete catastrophe because aid deliveries by the government are blocked.
Hundreds of people who need urgent medical evacuation have not been allowed outside the enclave.