Yesterday's election was reportedly marred by widespread problems relating to the electoral register.
Reports this morning say thousands of voters encountered serious difficulties in casting their vote at polling stations in several parts of the country.
Many found that their names were no longer on the register, while others were sent to the wrong polling station or given the wrong card number.
The problems are believed to have been caused by the Government's €12m campaign to clean up the register.
The Green Party is already calling for a formal investigation into the way the clean-up was handled, but the Department of the Environment says it has received no reports of any voting difficulties.