Extra gardaí were deployed in parts of Waterford City over the weekend following a number of incidents.
Three men were injured when a pellet gun was discharged yesterday evening, and another man was stabbed a number of times with what is believed to have been a hatchet.
At least six men were treated in hospital for injuries relating to these and other incidents, which are believed to centre on a row between two families.
At one stage, armed gardaí were on duty at Waterford Regional Hospital, fearing an escalation of the violence.
So far, gardaí have not made any arrests.
