The ongoing cost of maintaining electronic voting machines was discussed again at the Oireachtas Public Accounts Committee today.

Questions were raised about the big variations in the cost of storing and insuring the machines in different parts of the country.

The total cost of maintaining the machines is likely to run to €1 million each year for the next 20 years.

The committee also heard that the Office of the President cost the State over €7.5 million last year.

It was also revealed that €392,000 was spent on the Secret Service.