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Al-Qaeda-linked ISIS under attack in northern Syria Al-Qaeda-linked ISIS under attack in northern Syria
(about 3 hours later)
A powerful al-Qaeda affiliate is on the defensive in north Syria, reports say, as it comes under attack from Islamist and other rebel factions. A powerful al-Qaeda affiliate in Syria has issued an ultimatum to other rebel factions that have been fighting it.
The Islamic State in Iraq and the Levant (ISIS) is accused of tacitly assisting the regime and imposing a reign of terror on areas it controls. The Islamic State in Iraq and the Levant (ISIS) threatened to leave the city of Aleppo to government forces unless its rivals stop their attacks against it within 24 hours.
Dozens of fighters are reported to have been killed in clashes which erupted on Friday in Aleppo and Idlib provinces. ISIS has suffered losses in two days of fighting against an alliance of rebel forces in Aleppo and Idlib provinces.
But reports from Iraq say ISIS has made a key advance in the city of Falluja. The group is accused of imposing a reign of terror on areas it controls.
It is controlling the southern part of the city, a security source told the BBC. An Iraqi reporter in Fallujah told the BBC that tribesmen and other militants control the rest of it. In an audio message, an unidentified ISIS spokesman called on other rebel groups to lift checkpoints and release all the prisoners they hold.
Residents say they fear that security forces may launch a major offensive to retake the strategic city in western Iraq. He said ISIS had been "stabbed in the back", and that if the attacks did not stop, it would have no choice but to pull back from the frontlines of Aleppo.
Alliance against ISIS Dozens of its members are reported to have been killed or captured over the past two days.
In Syria, ISIS is fighting Free Syrian Army groups as well as the Islamic Front, a coalition of Syrian rebel factions which also wants to build an Islamic state in Syria, says the BBC's Rami Ruhayem, reporting from Beirut. The BBC's Rami Ruhayem in neighbouring Lebanon says the fighting in northern Syria has highlighted a deep rift between groups that share a lot in ideology and aspirations.
Fighting flared on Friday, prompted partly - reports said - by ISIS gunmen who fired into a group of residents of the Aleppo village of Kafr Takharim. ISIS is fighting Free Syrian Army groups as well as the Islamic Front, a coalition of Syrian rebel factions which also wants to build an Islamic state in Syria.
They had been protesting against the death of a doctor and rebel commander in ISIS custody. The fighting flared on Friday, prompted partly - reports said - by ISIS gunmen who fired at residents of the Aleppo village of Kafr Takharim. They had been protesting against the death of a doctor and rebel commander in ISIS custody.
Rival rebel groups say ISIS has alienated them and attempted to hijack their struggle for its own ends. Other rebel groups say ISIS has attempted to hijack their struggle for its own ends.
ISIS fighters are "undermining stability and security in liberated areas through theft, kidnapping and trying to impose their own brand of Islam", Reuters news agency quoted the newly formed Mujahideen Army as saying.
It vowed to fight until ISIS was disbanded or driven out of Syria.
'Helping Assad''Helping Assad'
An Idlib activist, Abu Leyla, told AFP news agency that ISIS "only benefits the Assad regime".An Idlib activist, Abu Leyla, told AFP news agency that ISIS "only benefits the Assad regime".
"They have taken over roads from local fighters and then withdrawn, opening the way to the army. They take over border crossings to control arms shipments for the rebels. People have had enough," Abu Leyla said.
That was echoed by the main opposition National Coalition of Syrian Revolution and Opposition Forces, which applauded the FSA's efforts to dislodge ISIS.That was echoed by the main opposition National Coalition of Syrian Revolution and Opposition Forces, which applauded the FSA's efforts to dislodge ISIS.
"ISIS is an extension of the Assad regime," the Coalition's Munzer Akbik said."ISIS is an extension of the Assad regime," the Coalition's Munzer Akbik said.
"The Syrian people clearly have rejected al-Qaeda's attempts to establish a presence in liberated territories. The solution to fighting extremism in Syria is to strengthen the Free Syrian Army at this critical juncture." "The solution to fighting extremism in Syria is to strengthen the Free Syrian Army at this critical juncture."
Fighting has been reported in:Fighting has been reported in:
The fight against ISIS appears to be the priority for all groups fighting the Syrian government, with one exception - the Nusra Front, our correspondent says.The fight against ISIS appears to be the priority for all groups fighting the Syrian government, with one exception - the Nusra Front, our correspondent says.
Organically linked to ISIS, the two groups used to follow the same al-Qaeda leadership until they split last year. Nusra is now closely allied to the Islamic Front, and has been trying to remain neutral.Organically linked to ISIS, the two groups used to follow the same al-Qaeda leadership until they split last year. Nusra is now closely allied to the Islamic Front, and has been trying to remain neutral.
For all the groups involved, the fighting is diverting precious resources away from the fight with the Syrian government, our correspondent adds.For all the groups involved, the fighting is diverting precious resources away from the fight with the Syrian government, our correspondent adds.