Al-Qaeda chief Ayman al-Zawahiri has told rival the militant groups in Syria to accept independent "Islamic arbitration" to end three months of infighting, saying in an audio message Friday the violence is "sedition".

Al-Qaeda chief Ayman al-Zawahiri has told rival the militant groups in Syria to accept independent "Islamic arbitration" to end three months of infighting, saying in an audio message Friday the violence is "sedition".

Militant groups in Syria, including the Islamic Front and Al-Qaeda's affiliate Al-Nusra Front, have been in fierce fighting with the terrorist Islamic State of Iraq and the Levant (ISIL) since January.