Seven nurses have been suspended following allegations of falsifying patient records at the Princess of Wales Hospital in Bridgend.
It comes after police previously arrested three other nurses there on suspicion of neglect following claims that notes had been falsified.
The latest suspensions were confirmed in a statement by Abertawe Bro Morgannwg University Health Board.
A spokesman for the hospital said: ‘Early in 2013 internal systems within the Princess of Wales Hospital picked up alleged anomalies regarding the record keeping of a small number of nurses.
‘The Health Board notified the police, and a criminal investigation (still ongoing) was then launched. As a result, three nurses were arrested and bailed and a further 7 were suspended on suspicion of falsifying records.
‘The investigation is ongoing and it would be inappropriate to comment any further at this stage.’
A South Wales Police spokesperson added: ‘The investigation is ongoing and it would be inappropriate to comment any further at this stage.’