"Turkey constantly keeps sending reinforcements to the observation units located within the northern Syrian territory," Alwan said.
He added that this could be the case of both Turkish military officers' rotation, and of the expansion of their ranks.
"Last night, new reinforcements arrived. Pieces of artillery, in particular, were delivered," Alwan said, specifying that they had been delivered to the observation units located in the Idlib de-escalation zone.
Alwan suggested that the Turkish army was strengthening its position in Syria's north out of fear of terrorist attacks.
Turkey, along with Iran and Russia, contributes to the Syrian crisis settlement by being a guarantor of the ceasefire regime in the country and promoting stability and security establishment there.