Two more men have been arrested in connection with the death of the former Lostprophets frontman, Ian Watkins, at HMP Wakefield, West Yorkshire police said.
Watkins, 48, who was serving a 29-year sentence with a further six years to be served on licence after admitting a string of offences including the attempted rape of a baby, died after being assaulted in the high-security jail on 11 October.
