Fighting between rival Jihadist groups in eastern Syria killed 63 people on Monday, despite a call from Al-Qaeda's chief for a ceasefire, the Syrian Observatory for Human Rights said. The clashes between Al-Qaeda's Syrian branch Al-Nusra Front and the Islamic State of Iraq and the Levant (ISIL) have prompted 60,000 people to flee towns in the oil-rich province. The Observatory said 58 fighters on both sides had been killed in the clashes on Monday, along with five civilians. The two Jihadist groups have continued to clash despite a call from Al-Qaeda chief Ayman al-Zawahiri for an end to hostilities.