Two more patients linked to allegations of sabotage at a hospital in Stockport have died, bringing the total to five.
One of the patients, who was in his 40s, had been “very poorly” for several days.
Stepping Hill Hospital confirmed his death as police continued to question a nurse arrested on suspicion of the murder of three other Stepping Hill patients.
Rebecca Leighton, 27, was arrested on Wednesday at her home in Stockport, just a mile from the hospital where she worked and where the deaths took place.
Tracey Arden, 44, George Keep, 84, and Arnold Lancaster, 71, are thought to have died following the deliberate contamination of saline solution with insulin.
The Nursing and Midwifery Council confirmed that Leighton had been arrested.
Her registration will be suspended while she remains under investigation, the organisation said.
Police have until early this evening to continue questioning Leighton before they must decide whether to charge her, release her or apply for more time to keep her in custody.
Police stress they are still treating the deaths as unexplained and are expected to give further details about the latest deaths at a press conference later this afternoon.