Turkish military vehicles have been photographed in the northwestern Syrian province of Aleppo while Turkish troops have been spotted digging a trench there.
The Kurdish Hawar News Agency (ANHA) posted the pictures on its website on Thursday, saying dozens of the vehicles had encroached 200 meters (0.1 miles) into the province.
The troops were then spotted digging a trench between two villages, known as Sorka and Meidan Ekbis.
The news agency added that a concrete wall was also under construction on the nearby Syrian border.
The area forms part of Rojava, a region within Aleppo which has proclaimed autonomy from the Syrian government but has not been recognized by Damascus as autonomous.