Building contractors should be given authority to conduct random drug and alcohol tests of construction workers, either through legislation or through negotiations with unions, a spokesman for a construction trades group said a day after three union members were fired for entering the CityCenter job site after drinking at nearby bars.

Steve Holloway, executive vice president of the Las Vegas chapter of the Associated General Contractors, said Friday that the number of construction workers who are drinking on the job represents a small fraction of the total work force on the site.

However, "it's a large enough minority that it needs to be dealt with, probably by legislation that would allow a construction contractor to perform random drug and alcohol testing," he said.

Holloway is a member of an eight-person task force that was set up in the wake of a series of 12 construction worker deaths at Strip sites in the past 18 months. The committee is looking at possible legislation to be considered by the 2009 Legislature.