Arlene Foster has hit out at Sinn Féin for making an IRA commemoration "sound like a fun day out for all the family".
The former DUP leader also accused Sinn Féin MP John Finucane, who is billed as the event's main speaker, of "glorifying terrorists".
Mrs Foster shared an image online of a poster advertising the "South Armagh Volunteers Commemoration" on June 11, assembling at Mullaghbawn Community Centre.