According to AFP correspondent, the explosions were heard in Damascus on Monday, adding that the blasts began at around 6:00 a.m. (0300 GMT).
The helicopter believed to belong to Syrian regime forces was downed by fighters from the Free Syrian Army.
“It was in revenge for the Daraya massacre,” Omar al-Qabooni, spokesman for the FSA’s Badr battalion in Damascus told AFP, adding that rebels had found the body of the pilot after the helicopter crashed to the ground in a ball of flames.
The FSA also said it shot down a Syrian warplane on August 13 in the eastern province of Deir Ezzor, but the claims cannot be independently confirmed.
It is to be mentioned here that according to independent estimates more than 20, 000 people have been since the popular uprising against the Syrian regime led by President Bashar-al-Assad.