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
Friends of a Rotherham teenager, who is battling leukaemia, are walking 63 miles to Cleethorpes - to help raise funds for treatment in US.
Often very windy with rain or showers
Often very windy, especially as we head into Sunday, with rain or showers. Met Office 'Be Aware' warnings have been issued