Before the parliament had acted the electoral commission said it was voiding 1,021 ballot boxes from around the country, along with votes cast by Iraqis overseas and Iraqis still living in displacement camps that were set up during the battles against ISIL.
Firefighters stopped the fire from spreading to the remaining three warehouses, where the ballot boxes are stored, he said.
"There is no doubt that it was a deliberate act and I am personally following up on the investigation with the criminal police and the committee tasked with probing the fire", Qassem al-Araji said June 11.
Iraq's prominent Shiite cleric Moqtada al-Sadr Monday warned of the seriousness of the situation in Iraq by the political struggle after a huge fire that burnt warehouses storing ballot boxes of Iraq's parliamentary election in downtown capital Baghdad.
Interior Ministry spokesperson Major General Saad Maan said Sunday that the fire has been brought under control.
Iraqi authorities said no ballot papers were destroyed in the blaze.
A recount would test the number of votes won by Shi'ite Muslim cleric Moqtada al-Sadr, a long-time adversary of US involvement in Iraq whose bloc, consisting of secularists and Communist Party allies, won the largest number of seats in the election.
The ballot boxes are needed for a manual recount of votes, mandated in a law passed by the Iraqi parliament on Wednesday.
A fire has torn through Iraq's largest ballot warehouse, ahead of a controversial recount prompted by allegations of fraud.
The destruction of ballot boxes may serve those who lost in the last elections and desperately demanded a recount and, as a last resort, a new elections round for parliament.
It is this old guard clamouring for a recount: the outgoing parliament also voted to annul ballots of displaced Iraqis and sacked the nine-member independent commission that oversaw the vote.
Al-Sadr himself can not be named prime minister because he didn't run in the elections.
The election was the first since the defeat of Islamic State raised hopes that Iraqis could put aside their communal and sectarian divisions and reconstruct the country.
The depot housed ballot boxes from the city's al-Rusafa district.
"We call for the election to be repeated", he said.
Less than half of Iraq's 24-million electorate took part, dumping the old guard in favor of Sadr's alliance followed by a list of former fighters of the Hashed al-Shaabi alliance that previous year played a key role in the defeat of the Daesh terror group.
The elections were marred by complaints about the alleged manipulation of the electronic voting system used for the first time in May. Meanwhile, Iraq's Independent Higher Election Commission said all the ballot boxes in the warehouse are safe. He said there were attempts by some to cause a civil war but promised he would not participate in one.