Gardaí have also reissued an appeal for people to not engage in this behaviour.
Repeated illegal gatherings, intimidation and littering have been reported in the Slieve Blooms.
Independent Laois councillor James Kelly says anti-social behaviour is once again affecting the area, with a number of cars gathering along the JJ Fanning Pass and a car also being burned-out.
Gardaí have also reissued an appeal for people to not engage in this behaviour, and for anyone experiencing such issues to contact Birr or Portlaoise Garda Stations.
Councillor Kelly says it's especially inappropriate given the covid situation: