General Mustafa al-Sheikh, head of the Higher Military Council, an association of senior officers who defected from President Bashar al-Assad's forces, said the tanks had assembled at the Infantry School near the village of Musalmieh northeast of the city of Aleppo, 30 kms (19 miles) from the Turkish border.
"The tanks are now at the Infantry School. They're either preparing to move to the border to counter the Turkish deployment or attack the rebellious (Syrian) towns and villages in and around the border zone north of Aleppo," Sheikh told Reuters by telephone from the border.
He said the tanks were mostly from the 17th Mechanised Division. Turkey deployed air defence weaponry along its border with Syria on Thursday, following Syria's downing of a Turkish warlplane over the Mediterranean on Friday.