Gardaí have confirmed that the two teenagers, aged in their late teens, have been released without charge and that their investigation continues.
The party’s election-focused website was launched in January asking users to ‘join the conversation’ and submit ideas for the party to tackle if it were in government.
In the hacking attack, the new site was replaced with a holding page marked ‘Anonymous’. The hacked page said that the site was censoring visitors.
Fine Gael subsequently said that the personal data of around 2,000 people who had registered to comment on the site had been compromised in the attack.