The fatalities occurred when PKK/PYD terrorists attacked the opposition-held Marea town, Alaa Nima told Anadolu Agency.
He said a pregnant woman was among the victims while three children were among those injured in the attack.
"PYD has been targeting the town for a long time with a variety of weapons," Nima said, asserting that Sunday's attack targeted residential areas.
Meanwhile, Abdulfattah Hussein, a member of Syria's Local Coordination Committee (LCC), said that the Syrian opposition retaliated to the PKK/PYD attacks.
A number of opposition fighters were transferred to Turkey for treatment after critical injuries in clashes with the terrorist group in the western part of Marea, Hussein said.
PKK/PYD had captured Tal Rifaat city as a launching point of their attack against the opposition-held areas of Marea and Azaz in Aleppo province.
