Iraq's electoral commission said it intended to audit "unusually high" numbers in results coming from most provinces in Saturday's landmark referendum.
The commission's statement came Sunni Arab lawmaker, Meshaan al-Jubouri, on Monday claimed fraud had occurred in the vote - including instances of voting in hotly contested regions by pro-constitution Shiites from other areas - repeating earlier claims of election-fixing made by other Sunni officials over the weekend.
"Statements coming from most govern orates indicating such high numbers that require us to recheck, compare and audit them, as they are unusually high according to the international standards," the Independent Electoral Commission of Iraq said in a statement.
The commission said it would take random samples from ballot boxes from areas reporting "very high percentages or too low percentages in the results."
It did not specify which provinces the unusual reports were coming from, or say whether the unusual numbers could effect the outcome.
The commission said it would "need a few more days" to reach a final result, particularly given the need to check the unusual numbers.