A number of homes were damaged and two men seriously injured.
Three men have been charged in connection with violent disorder and criminal damage in Co. Westmeath.
On Thursday Gardai were called after a crowd gathered in the Grange Crescent area of Mullingar, some armed with pickaxe handles.
A number of homes were damaged and two men seriously injured.
One man in his 30s was arrested at the scene and has since been charged and appeared in court.
Three men in their 30s and one in his 20s were arrested in a follow-up operation yesterday.
One man in his 30s has since been released without charge, but the rest are appearing before a special sitting of Mullingar District Court this afternoon.
Missing Man's Boat Found On Midlands Lake
Laois Village Facing Water Disruption Today
Offaly School Fundraising For Astro Turf Pitch In Memory Of Ashling Murphy
Gardaí Searching For Missing Man On Midlands Lake
Enterprise Minister Downplays Government's Ability To Help On Home Heating Oil
Midlands Prison Hit By Mass Overdose Incident
Offaly Man To Complete Marathon Challenge In Honour of Ashling Murphy
Recruitment Of First-Ever Professors For Ireland's Technological Universities Launched