The Sunday Independent has dropped long-time columnist and former senator Eoghan Harris, over an anonymous Twitter account.
The paper says he was involved in the running of a fake account that mostly posted about Irish politics.
Editor Alan English says the material would never have been published in the Sunday Independent.
Mr Harris was a big critic of Sinn Féin - and the party's justice spokesman, Martin Kenny, says the paper was right to drop him.
Wicklow Surgeon Honoured By Tallaght University Hospital
Extra Lifeguards Deployed With Extended Hours On Wicklow Beaches This Week
Bus Service Boost For Wicklow with Connections to Carlow & Kilkenny
Greystones Man Given Suspended Sentence Following Sustained Campaign Of Abuse
Appeal for Information As Rathdrum Man Reported Missing