Betsi Cadwaladr Health Board has closed a mental health unit after concerns were raised about the quality and safety of patient care.
Tawel Fan mental health ward in the Ablett Unit at Ysbyty Glan Clwyd will close with immediate effect on a temporary basis while an investigation is undertaken.
The health board says it's working with local authorities and the police.
The Welsh Government and Health Inspectorate Wales have also been informed.
A small number of staff have been removed from clinical duties while the investigation takes place.
The health board says the remaining staff will be redeployed to support patients in other clinical areas.
The health board says alternative arrangements have been made for the small number of patients affected to be cared for elsewhere.
Here are some of the key recommendations from the report into the care of patients on the Ablett Unit at Glan Clwyd Hospital.
The Chief Executive of Betsi Cadwaladr University Health Board, Professor Trevor Purt has apologised for 'letting patients down'