Updated: 10am
A bomb threat was made to the home of Taoiseach Simon Harris while his family were present.
It is understood that Mr Harris's wife and two young children were at home on Wednesday evening when the anonymous call was made.
Gardaí searched the house and declared the call a sinister hoax, a source told the Irish Examiner.
Speaking on Thursday morning, Sinn Féin's Louisa O’Reilly expressed support for the Taoiseach and his family following the incident.
“My understanding is that the Taoiseach wasn't at home, but his family were.
“It must have been very frightening for them, and obviously we send our support to the Taoiseach and his family,” Ms O’Reilly told RTÉ radio's Today programme.
“I think as politicians, we need to be able to say and speak with one very, very clear voice that this will not be tolerated. We cannot be intimidated. We have work to do, and we should be free to do that work without fear of intimidation.”
There is an extra “deeply distressing and very disturbing” element when someone's home is involved, Ms O’Reilly said, adding: “I want to send my support to the family, because I know it must have been very traumatic for them.”