A nurse who was re-arrested following an investigation into the deaths of a number of babies at the Countess of Chester Hospital's neonatal unit has been bailed pending further inquiries, a Cheshire Police spokesman said.
Lucy Letby, 29, was re-arrested on Monday on suspicion of murder in relation to the deaths of eight babies and the attempted murder of six babies.
She was also arrested in connection with the attempted murder of another three babies.
"I would like to remind people that, due to the nature of this investigation, it is extremely challenging and remains very much active and ongoing.
Police urged anyone with information to get in touch with the investigation team at email@example.com.
Information can also be passed on anonymously, via Crimestoppers, on 0800 555 111 or via the Major Incident public portal at https://mipp.police.uk/operation/9901020317C89-PO1