ISIS leader Abu Bakr al-Baghdadi has called on Muslims to obey him, in his first video sermon.
Abu Bakr al-Baghdadi has been appointed caliph by the jihadist group, which has seized large swathes of Iraq and Syria.
The video appears to have been filmed on Friday during a sermon at the al-Nouri Mosque in Mosul, northern Iraq.
The footage surfaced on Saturday amid reports that he had been killed or wounded in an Iraqi air raid.
ISIS leader Abu Bakr al-Baghdadi has called on Muslims to obey him, in his first video sermon (photo AFP)
It was not clear when the attack was supposed to have taken place.
In the sermon, at Mosul’s most famous landmark, Abu Bakr al-Baghdadi praised the establishment of the “Islamic state”, which was declared by ISIS last Sunday.
Experts say the reclusive militant leader has never appeared on video before, although there are photographs of him.
“Appointing a leader is an obligation on Muslims, and one that has been neglected for decades,” he said.
Abu Bakr al-Baghdadi also said that he did not seek out the position of being the caliph, or leader, calling it a “burden”.
“I am your leader, though I am not the best of you, so if you see that I am right, support me, and if you see that I am wrong, advise me,” he told worshippers.
Captions in the video referred to Abu Bakr al-Baghdadi as “Caliph Ibrahim”, a name he has used since the group unilaterally declared him leader of an “Islamic state” last Sunday.
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ISIS militants have announced they are establishing a caliphate, or Islamic state, on the territories the Islamist group controls in Iraq and Syria.
ISIS (the Islamic State in Iraq and the Levant) also proclaimed the group’s leader, Abu Bakr al-Baghdadi, as caliph and “leader for Muslims everywhere”.
Setting up a caliphate ruled by the strict Islamic law has long been a goal of many jihadists.
Meanwhile, Iraq’s army continued an offensive to retake the northern city of Tikrit from the ISIS-led rebels.
Tikrit was seized by the insurgents on June 11 as they swept across large parts of northern-western Iraq.
ISIS militants have announced Islamic state on the territories the Islamist group controls in Iraq and Syria
In a separate development, Israel called for the creation of an independent Kurdish state in response to the gain made by the Sunni rebels in Iraq.
ISIS announced the establishment of the caliphate in an audio recording posted on the internet.
The group also said that from now on it would be known simply as “the Islamic State”.
The declaration harks back to the rise of Islam, when the Prophet Muhammad’s followers conquered vast territories in the Middle Ages.
The Sunni-Shia split happened because of a dispute over the succession to Muhammad, with the Sunnis following caliphs as their religious authority.
ISIS said the Islamic state would extend from Aleppo in northern Syria to Diyala province in eastern Iraq.
Abu Bakr al-Baghdadi would become the leader of the state and would be known as “Caliph Ibrahim”.
In the recording, the rebels also demanded that all Muslims “pledge allegiance” to the new ruler and “reject democracy and other garbage from the West”.
On Sunday, Iraqi government jets struck at rebel positions and clashes broke out in various parts of Tikrit, witnesses and officials said.
Troops had reportedly pulled back to the nearby town of Dijla as Saturday’s initial offensive met stiff resistance.
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