Iraq was on Sunday investigating whether ISIL terrorist group chief Abu Bakr al-Baghdadi was killed in air strikes by US-led coalition warplanes targeting the group’s leaders.

Iraq was on Sunday investigating whether ISIL terrorist group chief Abu Bakr al-Baghdadi was killed in air strikes by US-led coalition warplanes targeting the group's leaders.

"Until now, there is no accurate information available," a senior Iraqi intelligence official said when asked about whether Baghdadi had been killed.

"The information is from unofficial sources and was not confirmed until now, and we are working on that," the official said without specifying what the initial reports indicated.

US Central Command, which oversees American forces in the Middle East, on Saturday said that coalition aircraft conducted a "series of air strikes" against "a gathering of ISIL leaders near Mosul".

"We cannot confirm if ISIL leader Abu Bakr al-Baghdadi was among those present," said Centcom spokesman Patrick Ryder.