Papua New Guinea's electoral commissioner says he will conduct an investigation into allegations of widespread voter fraud.
With the PNG poll now in its second week, the Electoral Commissioner, Andrew Trawen, has defended his agency's handling of the 2012 elections.
He says producing a clean electoral roll was difficult because of widespread fraud.
Many voters have complained their names are not on the roll at some voting booths.
Mr Trawen acknowledges fictitious names are also a concern amid allegations names appearing on the preliminary roll were not on the final roll.
He says the Commission has found evidence of deliberate actions by some to remove names, add names and modify the status of persons.
A candidate for governor in the newly created province Jiwaka, Bill Gardner, says there has been foul play between the preliminary rolls going to Moresby and the roll then coming out of Moresby.
He says the problems are going to cause a fair bit of grief in parts of Jiwaka.