Syrian President Bashar Assad said Turkey will pay a high price for supporting Syrian opposition fighters, accusing Ankara of hosting terrorists along its borders.
He added that those fighters will soon turn against Turkey.
In an interview with a Turkish TV channel to be screened on Friday, Assad said that Turkish Prime Minister Recep Tayyip Erdogan is "fanatic"and claimed that Turkey allows terrorists to cross the borders and attack the Syrian army and civilians from there.
In the same interview, which was published on the channel's website, Assad added that Turkey cannot use terrorism as a playing card, saying this will eventually fire back at Turkey itself.
Syria and Turkey have a 900-kilometer long common border. Turkey is a severe critic of Assad and strongly supports his opposition but denies that it arms opposition fighters.
Turkey hosts one quarter of the Syrians who fled the ongoing fighting in their country.
Turkey has been concerned by the divisions between Syrian opposition fighters and the big impact fundamentalist Islamists in Syria have. Turkey's Western allies who are opposed to Assad share the same fears.
The Islamic State in Iraq and the Levant, a group affiliated to al-Qaeda, last month controlled Azaz, located five kilometers from Turkey's borders, and has since been clashing with the Syrian Asefat al-Shamal Brigade.
