Excavation work is believed to have begun today as part of an investigation into missing Naas man Trevor Deely.
A new line of inquiry led Gardaí to a site in Chapelizod in West Co. Dublin over the weekend.
A three-acre wooded site was sealed off by Gardaí.
Mr Deely disappeared on his way home from a work Christmas party in the early hours of December 8, 2000.
There are reports circulating that Trevor was murdered by a well-known Dublin criminal, but Gardaí have not officially confirmed this information.
Detective Inspector Paul Costello indicated to media that this could be a long and extensive operation, he said that the search will be ongoing for the forseeable future.