Tunis, March 19- Tunisian troops clashed with Islamist militants near the border with Algeria on Tuesday, a security source said, in an area where the army is hunting al-Qaida-linked fighters.
Tunisia, economically struggling and deeply polarized between Islamists and their opponents, is in the throes of a political transition that began with the overthrow of strongman Zine Abidine Ben Ali in a popular uprising two years ago.
The Islamist-led government is struggling to restore stability following the assassination of secular opposition figure Chokri Belaid on February 6 which provoked widespread unrest.
The security source said Tuesday's clash took place in the northwest town of Tajrouin, in Kef province, between the army and six members of a "terrorist group". There were no immediate reports on casualties.