Gardai are investigating.
A Sinn Féin TD says a threat of gun violence made to the office of one of his colleagues has been referred to the Gardaí.
The Irish Examiner reports a rural TD's office was called by someone threatening to make their way to the Dáil with a firearm.
Sinn Féin TD Darren O'Rourke says he hasn't yet been in contact with the TD involved:

Rosslare Europort Faces Disruption Amid Fuel Protests
Fuel Protests Force Major Road Closures Across Leinster
Artemis 11 Lands Safely
Fuel Blockades Continue
Protestors, Including Kildare's John Dallon, Refused Entry From Government And Agriculture Bodies Meeting
Artemis II Prepares To Splash Down Off US Coast
Martin Heydon Will Meet Farming And Haulier Groups This Morning Amid Fuel Protests
Section Of N7 Northbound Closed Due To Protests