The fighting broke out in the village of Sarmada on Wednesday and caused several casualties from both sided.
Hundreds of people also demonstrated in the Idlib town of Maaret al-Numan against ISIL, demanding that that the group set free all of those it has seized.
Some observers have focused on the growing clout of ISIL, as well as the notion that the Al-Qaeda-inspired group supposedly “learned its lessons” from years past in Iraq, where it had engaged in terrorizing civilian populations.
But in many areas, the group has been accused of engaging in systematic arrest campaigns of civilian activists, as well as clashing with militant groups.
Syria has been gripped by deadly unrest since 2011. According to reports, Western powers and their regional allies - especially Qatar, Saudi Arabia, and Turkey - are supporting the militants operating inside the country.
BA/BA