Syrian troops carried out raids Saturday (August 24th) in Daraya, south-west of Damascus, where more than 120 people have been killed in an army operation this week, AFP reported.
According to figures from the Syrian Observatory for Human Rights, at least 15 of these people -- all civilians -- were killed either by gunfire or were summarily executed on Saturday.
Between 40 and 50 bodies were also discovered near a mosque, the Observatory said.
On Saturday, a child was killed by random fire in Daraya and a man was shot dead by a sniper, according to the Observatory, adding that clashes broke out as troops carried out security sweeps, leaving one opposition fighter dead.
"Security forces have launched a campaign of arrests and residents are anxious and afraid that there will be another civilian massacre" in Daraya, according the Local Co-ordination Committees.
The army claimed to have retaken most of Damascus in late July, after some two weeks of intense fighting across the capital's southern belt.
August is the deadliest single month of the Syria conflict with over 4,000 people killed, the Observatory said Friday.
It said some 24,500 had been killed since the uprising erupted in March last year. The United Nations puts the death toll at more than 17,000.