The Anadolu news agency reported that the media outlet's correspondent had seen the convoy crossing into the territory of the Syrian Hasakah province on Monday night.
The news outlet added that the convoy included trucks, fuel tankers and low-loaders transporting Humvee vehicles and aimed to support the Syrian Kurdish Democratic Union Party (PYD), which Ankara considers to be a branch of the Kurdistan Workers' Party (PKK), outlawed in Turkey.
Within the framework of the Syrian civil war, the Kurdish groups have been controlling vast parts of Syria in such provinces as Hasakah and Raqqa, after driving jihadists from those areas.
On May 9, US President Donald Trump approved a plan to arm Kurdish groups fighting the Daesh (outlawed in Russia). The Turkish government has protested the move as Ankara believes the Kurdish fighters can use the weapons against Turkey.