An outbreak of Covid-19 has been identified at Naas General Hospital in County Kildare.
The virus has been detected on one major ward, but test results from patients have come back as negative.
The hospital said a Covid-19 outbreak has been confirmed on one ward, believed to be a 31-bed unit.
The ward is now closed to new admissions.
An Outbreak Control Team has been undertaking testing and contact tracing.
In a statement this evening, the hospital said swab results for patients have come back negative, while staff who are close contacts are self-isolating.
It is understood the source of the outbreak could be part of the cleaning team, who tested positive.
“The Hospital would like to reassure staff and patients that the appropriate steps have been taken in accordance with the national guidelines,” hospital management said in a statement.
“Staff and patients have been provided with key Hospital contacts should any concerns need to be addressed.”
Siptu organiser John Hubbard said representatives of the union held an emergency meeting with management to discuss concerns.
He added: “This reported outbreak is a stark reminder that as a community, we all must remain vigilant and continue to play our part in supporting all workers on the front line by adhering to national Covid-19 guidelines.”
The HSE has said it cannot comment on reports of a Covid-19 outbreak at Naas General Hospital.
County Kildare is at the centre of a recent increase in cases of the virus.
The county has had almost twice as many new cases as any other in the State in the past two weeks.
The 14-day incidence of Covid-19 there stands at 138.4 cases per 100,000 of population, almost eight times the national average.
The HSE said Naas General Hospital is following all protocols and national guidelines, but it cannot comment on individual cases or outbreaks to protect privacy and confidentiality.
It also said currently there are no confirmed cases at the Kildare facility.
The Irish Times reports a Covid-19 outbreak has been recorded on a 31-bed ward there, with the hospital trying to trace the extent of the cluster.
Medical staff were informed of the development yesterday evening.
As of 8pm last night, there were eight suspected cases in the hospital, but it is not known how many could be linked to the outbreak.