The source - who did not wish to be named citing reasons of security - alleged Wednesday that the Islamic State of Iraq and Levant (ISIL) planned to strike Turkish provinces and towns.
He claimed the group would hit population centers, and highlighted the province of Hatay as a possible target.
The source - speaking from Syria's main northern city of Aleppo - also alleged that the blast in Babel Hawa crossing on January 20 was in fact aimed at the Turkish gate opposite in Cilvegozu.
In May last year, a double car bomb attack in Reyhanli - near the Turkey-Syria border - killed 53 people and wounded dozens in the worst fallout for Turkey from the Syrian conflict.
Turkey hosts nearly 700,000 refugees from Syria's three-year-old civil war. The country is fiercely critical of the Syrian regime and hosts the Syrian National Coalition, Syria's main umbrella opposition group, in Istanbul.
englishnews@aa.com.tr
