Al Jazeera: Fighters linked to al-Qaeda have overrun a Syrian town near the border with Turkey after fighting broke out with units of the anti-government Free Syrian Army, opposition activists say.

Fighters from the Islamic State of Iraq and the Levant on Wednesday stormed the town of Azaz, 5km from the Syrian-Turkish border, and killed at least five FSA members, the activists said, adding 100 people were taken captive.

Reports in the late evening said that fighting was continuing and getting closer to a border crossing at Bab Al Salama, which is controlled by the FSA.

The fighting is the most severe since tensions mounted earlier this year between the rebel factions fighting to overthrow Syrian President Bashar al-Assad.

The fighting could pose a dilemma for the Turkish government, which has been allowing fighters to cross into Syria from its territory, but may not be keen to see al-Qaeda so close to its border.