The Taoiseach has said he will not be "deterred" from doing his job as gardaí investigate a threat made against him and his family over the weekend.
The threat, which was posted on Instagram, refers to a weapon and threatens violence against Simon Harris and his wife and children.
In a statement, Mr Harris said: "There can be no hiding place for anyone seeking to threaten, attack or harm people or to incite others to do so."
"Politicians have become a regular target and it is on the brink of being viewed as acceptable or a normal part of the job. It is not acceptable," he said.
"Constant efforts to target us, demean us or dehumanise us should never be accepted, never be normalised and always called out," Mr Harris added.
He also thanked people for the "kindness and decency" following the incident.
The threat remained online for at least two days after gardaí had asked the social media company to remove it.
Meta, the company which owns Instagram, said it has now removed the content for violating its policies and is investigating.
The company declined to say when it was made aware of the threat to the Taoiseach and when it removed it.
Meta also declined to say why the threat remained online for days, why it has not shut down the account, if it is co-operating with the garda investigation and why it waited until the violation was brought to its attention before removing it when it has the capabilities to proactively identify this material and prevent its dissemination.
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Latest threat made against Taoiseach
It is the latest threat made against Mr Harris, who has also had to deal with a bomb threat and protesters outside his family home.
Garda Headquarters confirmed they are investigating the matter.
Gardaí became aware of the threat made against the Taoiseach and his family on Instagram on Saturday night.
The threat, which referred to knives, also mentions the Wicklow Mountains.
Gardaí have described it as dark and sinister and are taking it seriously.
They requested that Instagram remove the post but it remained online over the bank holiday weekend on Sunday and yesterday where it was widely viewed, screenshotted and recirculated.
The account used has been set up under a widely used Irish name with three numbers and is today a private account, meaning it can only be accessed with the owner's permission.
It is not clear if the threat remains on the account today and is still visible to those with access.
A criminal investigation is under way and gardaí have also asked Instagram to provide them with the assistance needed to identify the person behind the account.
Detectives will also seek copies of the threat and other information in relation to it.
A garda spokesman however pointed out that it is not the role of the gardaí to request social media companies to remove threatening or violent material and that social media companies do not have to wait for a Garda request before taking action.
The spokesperson said these companies would be aware of material on their sites and can take action.
It is the second ongoing garda investigation into threats made against the Taoiseach.
They are also investigating a bomb threat made to this home in Wicklow six weeks ago.
No device was discovered following a search and gardaí are following a definite line of inquiry in the case.
The main suspect is currently serving a jail sentence for unrelated activities.
Threats against politicians have become more common, not just against the Taoiseach but also Minister for Justice Helen McEntee, Minister for Integration Roderic O'Gorman and People before Profit TD Paul Murphy.
The Assistant Commissioner in charge of the security of the State said over the weekend that gardaí have redoubled their work in relation to the security of politicians with overt and covert surveillance of those involved in suspected threats online and in person.
