A Prison Service spokeswoman said: "An incident at HMP Long Lartin on Thursday February 14 resulted in the death of prisoner Subhan Anwar.
"Two prisoners are now in police custody and the matter is being investigated by police."
More top news
Labour's Tracy Brabin will face nine other candidates in the by-election prompted by the death of MP Jo Cox.
The Red Arrows' summer season in the UK may have come to a close, but the team is still busy training.
Around a thousand people have attended the funeral of Didcot power station worker Ken Cresswell in Rotherham.