DAMASCUS, Sept. 1 (Xinhua) -- Two big explosions were clearly heard in the capital Damascus early Sunday local time, causes unknown, amid reports that the blasts took place at a military air base west of Damascus.

The explosions were heard reverberating from al-Mazzeh area in the western part of Damascus.

The state media outlets have yet to report the explosions but pro-government activists said the explosions rocked the Mazzeh air base with smoke and fire reported rising from the facility.