A man has been charged in relation to the death of Marie O'Brien, who died following a series of attacks at a psychiatric hospital in Waterford yesterday. 

The man in his 40s will appear before Waterford District Court tomorrow. 

55-year-old Ms O' Brien was a resident at St Otteran's Hospital in Waterford City. 

It is understood she was stabbed at least once during the attack which happened at around 7pm in a building in the grounds of the hospital. 

Another female patient and a female staff member were injured in the incident and treated at University Hospital Waterford.

Their injuries are not life threatening.

Two investigations have been launched.

The HSE will be carrying out a review of what happened.

Calls are already being made by a number of local politicians to examine staffing levels.

St Otteran's is the main long-term, residential psychiatric hospitals in Waterford City, with normally up to 50 patients.

Gardaí are not looking for anyone else in connection with the death.