Amid conflicting reports, an Islamic State (Isis) spokesperson has confirmed the militant group's leader Abu Bakr al-Baghdadi has been injured in a recent US air strike.

The US has not yet confirmed whether al-Baghdadi was among the wounded in the attack, but Iraqi security officials have been quoted as saying he was injured.

Nonetheless, Abu Mohammed Al-Adnani, an official spokesperson for the Sunni insurgent group, wrote on Twitter: "The leader of the ISIL [IS] Abu Bakr al-Baghdad has been injured.

"Do you think the State of Khilafa will end by the death of the Caliphate? We assure for the State that the Amir Abu Bakr al-Baghdadi is fine and we ask his followers to pray for God for his safety."

Some have questioned the credibility of the Twitter account.

The US air strike which took place in the IS-controlled city of Mosul was targeted at top leaders of the extremist organisation. Local officials in Mosul said more than 50 bodies were brought to a morgue following the US aerial bombardment.

"This strike demonstrates the pressure we continue to place on the ISIL [IS] terrorist network and the group's increasingly limited freedom to manoeuvre, communicate and command," the US Central Command said.

The Iraqi State television reported that al-Baghdadi's top aide was also killed in the air strike but it could not be independently verified.

There were rumours earlier regarding al-Baghdadi's injury or death, however these turned out to be false.