Two more men have been arrested in connection with the death of former Lostprophets frontman Ian Watkins at HMP Wakefield, West Yorkshire Police said.
Disgraced rock star Watkins, 48, who was serving a 29-year sentence for child sexual offences, died after an alleged attack at the West Yorkshire jail on October 11.
Rashid Gedel, 25, who was referred to as Rico Gedel in court, and Samuel Dodsworth, 43, have been charged with murder.
On Tuesday, West Yorkshire Police said two more men from the prison had been arrested on suspicion of conspiracy to murder.
The force said the men, aged 23 and 39, would be interviewed over the course of the day.
They will then be bailed and returned to prison while inquiries continue.
