A video appearing to show elections officials stuffing ballot boxes in a voting station in the North has been posted on the You Tube website.
The video show men wearing white jalabias and turbans, some with NEC orange vests, busy putting handfuls of ballots into different boxes sealed with orange cords and shaking them vigorously to mix up the contents.
There are no party agents or voters in the room.
Although the sound quality of the video is poor, a voice says the extension of voting period allowed them to finish the work.
Opposition parties said the video proved their case that the NCP had rigged the polls.
The National Elections Commission dismissed the video as fake and will not investigate it.