A full garda investigation is under way into allegations surrounding registration forms for the supplementary electoral register in Co Kerry.

The publication of the register, with around 3,000 additional voters’ names, was originally due to have taken place on Monday but was put back to yesterday, Tuesday, and has now been delayed further.

The enquiry centres on the Killarney electoral area, it is understood.

The central allegation is that large numbers of forms, involving up to 200 additional voters, or voters who were changing address, were stamped by a garda without the presence of the voters, as required.

The Garda Ombudsman Commission said it was aware of the matter, but would not comment on whether it was also involved in the investigation.

Last week, a garda spokesman told RTÉ News that preliminary enquiries had been initiated by gardaí in Killarney, after concerns were raised with them.