Litter wardens that challenge litter louts in blackspots are at risk of being the victim of a "serious assault", Dublin City Council boss Owen Keegan has said.
Dublin's north inner city was named Ireland's 'litter blackspot' in a survey released in January.
The country's latest litter league, compiled by the Irish Business Against Litter, lists the north inner city bottom of 40 areas across Ireland for rubbish.