The US-led coalition's attack on Deir ez-Zor Province, eastern Syria has killed 30 civilians on Friday night.
The attack happened 24 hours after US unexpected act to withdraw American forces from Syria.
Head of the Syrian Observatory for Human Rights Rami Abdul Rahman said that at least 27 of those who were killed were from Al-Shaafah Village.
Eight children were also killed in these attacks, he added.
He went on to say that the casualties count is subject to increase.
The US and some of its allies on the pretext of fighting Daesh created a so-called international coalition in August 2014.
The coalition has been formed without any coordination with Syrian government.
Many innocent civilians have so far been killed in Raqqa, Deir ez-Zor, Al-Hasakah and Aleppo and the Syrian infrastructures were also damaged.
