NEW DELHI: The enigmatic chief of Islamic State jihadist group Abu Bakr al-Baghdadi is dead, Radio Iran has reported on Monday.

Earlier, a Guardian report quoting sources with inside knowledge of the group reported that al-Baghdadi was severely injured in a US-led coalition air strike in March.

According to that report, al-Baghdadi was inujred at al-Baaj district of Nineveh, close to the Syrian border. It also said he was making a slow recovery and was out of his day-to-day control of the jihadist group.

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Al-Baghdadi, believed to be in his 40s, had a $10 million US bounty on his head. Since taking the reins of the Islamic State in 2010, he had transformed it from a local branch of al-Qaida into an independent transnational military force, positioning himself as perhaps the pre-eminent figure in the global jihadist community.

ISIS suffered a series of major setbacks in the recent months with many of its top commanders being killed or severely injured.

Recently, a top Iraqi military commander Lieutenant General Abdul Amir al Shammari told Sky News that his forces had killed "more than 250 terrorists in the past few days".

READ ALSO: ISIS suffers major setback in just a few days

He said this had been achieved with assistance from the Iraqi air force, military helicopters and coalition air strikes. "The coalition strikes provided cover for our troops to push forward."

Under the leadership of al-Baghdadi, the Islamic State, which called itself as the Islamic State of Iraq and Syria (ISIS) earlier, had gained ground across northern and western Iraq in a lightning advance in June and July last year, causing several of Iraq's army and police divisions to fall into disarray.

It had carried out thousands of public executions using brutal methods and implemented strict Islamic law in areas they captured, which sent shockwave across the global community.