David Martin, EirGrid Group Spokesperson:
“At EirGrid Group, the security of our computer network and of the electricity control system is an utmost priority.
“We take all necessary steps to ensure that our systems are secure and protected and we remain vigilant to potential cyber threats by continuously monitoring the external environment and by engaging with the relevant authorities.
“We can confirm that though our computer systems have not been breached, there was a breach of an external service provided by a third party which sat outside of our infrastructure. The impacted equipment has been replaced and there has been no interruption to the group’s systems or business.
“We do not intend to comment further.”