Air strikes on eastern Ghouta killed at least 30 civilians almost a month into a blistering Russia-backed regime assault on the Syrian rebel enclave outside Damascus.

The Britain-based Syrian observatory for human rights could not say who carried out the Saturday’s strikes on the town of Zamalka in a southern pocket of the enclave.

Regime forces have retaken 70 percent of the last rebel bastion on the outskirts of the capital since February 18, carving it up into three shrinking pockets held by different rebels.

According to the observatory which relies on a network of sources on the ground, the regime assault has killed more than 1,390 civilians in the enclave.

The offensive has pushed thousands more to flee their homes into government-controlled areas.

On Saturday morning, “around 10,000 civilians streamed out of the rebel enclave into regime-held areas”.

More than 40,000 civilians have poured out of the enclave since Thursday morning, fleeing bombardment and advancing troops.