The Woburn Masonic Village resthoom in Wai-iti Crescent, Lower Hutt has been affected by a suspected norovirus outbreak.
A spokesman for Regional Public Health said visiting had been restricted to the complex today after reports of vomiting and diarhoea among residents.
The spokesman said it was a suspected norovirus outbreak.
Mr Warick Dunn, chief executive officer at Wellington Masonic Villages Trust, confirmed a number of residents were suffering from vomiting and diarhoea at the facility.
"We have followed Department of Health guidelines and shut the facility to any new admissions or visitors … those residents who are unwell have been placed in isolation… and following Department of Health guidelines samples from those unwell have been sent off for analysis to determine what the cause may be.
"Until we get those results we are erring on the side of caution and care for our residents by restricting admissions to the facility," Mr Dunn said.
He declined further comment.
The Dominion Post understands there are at least 12 people affected by the outbreak.