Syria's main western-backed opposition group has criticised al-Qaida-linked gunmen and their expanding influence in the country, saying the jihadis seek to establish an Islamic state.
A statement from the Syrian National Coalition (SNC) follows days of vicious infighting in which the extremists seized control of the northern town of Azaz from mainstream opposition fighters.
The SNC says the actions of the al-Qaida-linked fighters "counter the principles that the Syrian revolution is trying to achieve".
The group also warns that the Islamic fighters are "strengthening their positions" in opposition-controlled areas.
The infighting threatens to further split opposition forces outgunned by President Bashar Assad's troops and strengthen his hand as he engages with world powers on relinquishing his chemical weapons.