The Mental Health Commission has confirmed that an unannounced inspection is taking place in a community residence in Castlerea, Co Roscommon.
Concerns about patient care and safety in Roscommon mental health services were raised at the annual conference of the Psychiatric Nurses' Association in Athlone this morning.
The commission said that a report on the inspection will be published by the commission in due course.
The PNA's annual conference in Athlone heard concern raised over a number of alleged serious incidents in a high-support facility affecting patients and staff.
PNA General Secretary Des Kavanagh said nurses had no confidence in the clinical and administrative management of the Roscommon services.
He told delegates that in the last 24 hours he understood that the Mental Health Commission had visited the facility.
Mr Kavanagh said he would be writing to Minister for Health Leo Varadkar seeking an independent investigation.
The HSE has said that any alleged serious incident that takes place in any of the services managed by Galway Roscommon Mental Health Services is fully investigated, in line with the HSE serious incident management policy.
It said it had "noted the comments from the PNA conference today and would urge any group or individual that has a specific area of concern to bring that our its attention to enable us to address it".
The HSE said the Roscommon Mental Health Services has adequate resources to deliver the services outlined in its annual service plan.
The services have a per capita spend of €191 compared to the national average of €160 per capita.
The HSE said staffing levels at all mental health services are reviewed on a regular basis to reflect the needs of the patients.
It said that currently the Mental Health Commission is visiting Roscommon and the report will be published by the Commission once the visit is completed.
It said Galway Roscommon service works closely with the Commission to ensure that any issues or concerns are addressed.