An airstrike on a gathering of Islamic State members in a town in western Iraq on Sunday killed several leaders but the group's top man, Abu Bakr al-Baghdadi, was not among them, hospital sources and residents said.
Iraq's military said earlier that it had targeted a meeting of Islamic State leaders and a convoy carrying Baghdadi to the gathering in two separate airstrikes.
"Iraqi air forces have bombed the convoy of the terrorist Abu Bakr al-Baghdadi while he was heading to Karabla to attend a meeting with Daesh commanders," a military statement read, using the Arabic acronym for Islamic State.
The military said the air force bombed a location where Baghdadi was planning to meet Islamic States commanders.
"The location of the meeting was also bombed and many of the group's leaders were killed and wounded. Fate of murderer al-Baghdadi is unknown and he was carried away by a vehicle. His health condition is still unclear," the military said after the strke.
Islamic State supporters said on Twitter on Sunday that even if the group's leader had been killed, his self-proclaimed caliphate would survive.
"Does the entire world not know that even if, hypothetically, our Sheikh al-Baghdadi, God save and protect him from all evils and dangers, was martyred, do you think the State of the Caliphate would end? Do you think we would leave?," said a tweet from a supporter.
Islamic State has seized swathes of Syria and Iraq and in June declared a caliphate over territory it controls. Baghdadi said he had accepted oaths of allegiance from supporters in Libya, Egypt, Yemen, Saudi Arabia and Algeria.