Sinn Féin members in the Dublin South West constituency have been ordered to stop all meetings and suspend all political activity.
It's after its councillors nominated Paddy Holohan for the job of Mayor of South Dublin County Council.
Sinn Féin's local branch members in the area were told of the decision in a letter, made public late last night, from Ken O'Connell, the party's political director south of the border.
It says "some recent political actions" in Dublin South West were viewed by the party's Ard Chomhairle "with deep concern" when it met last weekend.
The move follows the nomination of MMA fighter Paddy Holohan to become mayor of South Dublin County Council late last month.
Councillor Holohan was suspended from the party in January for comments he made on his podcast about then Taoiseach Leo Varadkar's family ties in India, suggesting they made him "separated from society" here.
He also suggested underage girls were having sex with men and then blackmailing them.
The party's president Mary Lou McDonald called the remarks "beyond offensive" when they surfaced during the general election campaign.
The letter makes it clear the ban on activity under its banner in the constituency includes meetings among its council group there.
Party officials now plan a full review of the area, and will meet on Saturday in Dublin to set terms of reference.
