The sources said that a convoy of Turkish military vehicles, including modern missile and artillery systems and armored and military vehicles has arrived at the border with Afrin in Northern Aleppo.
The sources confirmed that two units of the Turkish Special Forces have also arrived at border with Syria to participate in offensives against Kurds in the towns of Afrin and Manbij.
The Kurdish-language Hawar news reported on Tuesday that the Turkey-affiliated militant groups' artillery units deployed on Mount Sheikh Barakat in Western Aleppo have targeted Afrin.
The militants' mortar units affiliated to the Turkish army pounded Kurdish forces' positions in Bani, Badr Khan and Baker hills in Jandariseh region and in the villages of Bafloun, Qastal Jandu, Qatma and Ma'araska, Hawar news added.
It further said that four spy planes of the Turkish army have also been carrying out reconnaissance operations over Kurdish fighters' positions in Afrin and its countryside.