Iraqi lawmakers voted Monday to refer to the judiciary a report holding top officials, including ex-premier Nuri al-Maliki, responsible for the fall of second city Mosul, the parliament speaker said.

But there were disagreements over the report, with MPs voting to send it without an official reading, and members of the investigative committee that compiled it complaining that there was no vote to approve the recommendations it contained.

"Parliament voted to refer the (Mosul) file, including facts and evidence and names," to the judiciary, speaker Salim al-Juburi said in televised remarks, as reported by AFP.

"None of the names mentioned in this report were deleted, and all of them will be sent to the judiciary. An investigation and follow up and accounting of all those who caused the fall of Mosul will be carried out," Juburi said.

Former prime minister and current vice president Maliki was the most senior and controversial of those named responsible in the report for the Islamic State jihadist group's takeover of Nineveh province capital Mosul in 2014.