The Dogan News Agency says Thursday that a four meter-high (13-foot) slabs were being positioned along the border in the provinces of Kilis and Gaziantep. Video footage showed construction vehicles lining concrete blocks along the border, Censor.NET reports citing Associated Press.
A government official could not confirm the report.
Turkey has stepped up security along its border to prevent IS militants from entering Syria and crossing back into Turkey.
In August, Turkey also began constructing a wall along the border at the town Reyhanli, a main smuggling point southwest of Kilis.