Police have re-arrested a nurse in connection with poisoning deaths at a hospital.
Victorino Chua, 48, was held last year on suspicion of tampering with medical records at Stepping Hill in Stockport.
He was questioned on suspicion of three counts of murder and various counts of causing grievous bodily harm.
Chua was due to answer his bail next week but was arrested at his home today after it is understood new evidence emerged in the inquiry.
In a statement, Greater Manchester Police said: "A man has been arrested in connection with the investigation into the deliberate contamination of products and tampering of medical records at Stepping Hill Hospital.
"Today, a 48-year-old man was arrested on suspicion of three counts of murder, 18 counts of causing grievous bodily harm with intent and offences of poisoning under Section 24 of the Offences Against the Person Act.
"He remains in police custody for questioning."
The alleged poisoning offences relate to the tampering of medical records and the contamination of intravenous medicines at the hospital.