A woman has been arrested near Thornton Hall in north county Dublin, which has been earmarked as accommodation for International Protection applicants.
The woman, in her 50s, will appear in court today, charged with public order offences.
Gardaí were helping International Protection Accommodation Services and contractors enter the site as part of previously announced plans to use Thornton Hall for asylum seekers.
In a statement, gardaí said it had not been involved in "secretly moving international protection applicants onto the site".
This is a departure from the usual tone of garda press statements and reflects a determination to stamp out misinformation, disinformation and fake news which gardaí have said was linked to the site.
A spokesperson for the Minister for Integration said so-called "enabling works" started yesterday morning, in a bid to prepare the site, a process which will take four to five weeks.
Protests at the entrance to the site have already delayed work beginning for several months.
Gardaí continued to maintain a presence at the site and said they were engaging with those gathered peacefully at the location.
The Department of Integration said it expects to accommodate the first 40 people at Thornton Hall during September.
About 440 people will be accommodated in phases during October and November, and the long-term capacity is 1,000 people.
This will be tented accommodation at first, and later will be developed as modular accommodation.
A spokesman for the Department has said it was in touch with local public representatives and community groups in recent days, and said this engagement will continue next week.
Further meetings with community and elected representatives are planned for this and the coming weeks.
The Department said: "Thornton Hall is an important element of the Government Comprehensive Accommodation Strategy to establish larger, state-owned sites to provide accommodation for people seeking international protection."
