"Armed groups supported by Turkey have established control over the villages of Balaban, Amarna and Dabas, south of Jarabulus," the source said.
The source added that Syrian opposition fighters supported by Ankara were fighting in the vicinity of the Bir Qusa village, with the Kurdish-led Syrian Democratic Forces (SDF) and the number of casualties already surpassing 40 people.
Syria has been mired in civil war since 2011, with government forces loyal to President Bashar Assad fighting a number of opposition factions and extremist groups.
Turkey has been shelling Kurdish militias in northern Syria along the Turkish border for months. Ankara has claimed that the Syrian Kurds have links to the Kurdistan Workers’ Party (PKK), which is considered a terrorist organization by the Turkish authorities.