The so-called "border guards", trained by the US through the Pentagon and the CIA, have formed what they call "The North Army", said the sources, who spoke on condition of anonymity due to security concerns.

According to the sources, this new structure is to be composed mainly of the PKK/PYD.

Turkey has repeatedly said it would not tolerate such terror organizations to form a corridor in northern Syria along Turkey’s borders.

The latest news comes after the US Central Command (CENTCOM) Commander Gen. Joseph Votel announced on Dec. 22, 2017 that they would establish border forces in Syria, which he said would help prevent resurgence of IS.

Also previously, the US said they would continue to support the PKK/PYD in Syria's eastern Deir ez-Zor province, home to some of the country's most productive oilfields.

The army is expected to be deployed first in Kobani Tel Abyad, Ras al-Ayn, and al-Malikiyah -- all in Aleppo province and near Turkish border.

Despite Turkey’s objections, the US has continuously provided the PKK/PYD groups with arms, calling it an ally in the fight against IS.

Reporter’s code: 50101