A prisoner has been charged with the murder of an inmate.
Darren Ashcroft, 35, died in hospital on Friday after police were called to a reported assault at HMP Altcourse in Fazakerley, Liverpool.
Michael Kier, 41, of HMP Altcourse, is accused of murder and will appear at Liverpool Crown Court on Monday, said Merseyside Police.
A 20-year-old man arrested on suspicion of assisting an offender has been bailed and returned to the prison.
The Prison Service said the independent Prisons and Probation Ombudsman would conduct an investigation into the death.