Talks are taking place in Galway to try to resolve a dispute which has brought work on the city's Eyre Square redevelopment programme to a virtual standstill.
Thirty workers employed by the main contracting firm, Samuel Kingston Construction, have walked off the site in a row over wages.
The workers, 19 Irish and 11 Polish, claim some of the workforce were not paid last week and others were only paid part of the wages due to them. They say they will not return to work until the issue is resolved.
A small number of sub-contractors are still at work today.
Samuel Kingston Construction has so far made no statement on the dispute, but the men were called to talks with local management this morning.
Galway Corporations says the management of the workforce is a matter for the company.