Turkey has shelled positions of the US-backed, Kurdish-led Democratic Forces of Syria, in northern Syria, a senior official says.
"The posts which were hit were for the DFS and they are located in northern Minbij," Idriss Nassan says.
Meanwhile, the Britain-basaed Syrian Observatory for Human Rights said that scores of civilians were fleeing Jarabulus, an Islamic State-town under attack by Turkey and rebel factions, and heading towards Minbij, a town recently seized from the extremists by the DSF.
Firat, a pro-Kurdish news agency, also reported Turkish shelling.
Syrian Kurds condemn the Turkish incursion into Islamic State-held Jarablus, calling it a "declaration of war."
Turkish tanks crossed the border into Jarablus in northern Syria, state broadcaster TRT reported Wednesday citing military sources, while Syrian rebels forces told dpa they are also crossing into the Islamic State-held town from Turkey.