An 84-year-old man has become the first British prisoner to die after contracting coronavirus.
He died in hospital on Sunday.
He reportedly had underlying health issues.
A Prison Service spokesman said: “An 84-year-old prisoner at HMP Littlehey died in hospital on March 22.
“Our thoughts are with his family at this time.
“As with all deaths in custody, there will be an independent investigation by the Prisons and Probation Ombudsman.”
Across the UK, 19 inmates had tested positive for Covid-19 in 10 jails and four prison staff had tested positive for the disease in four jails, as of Wednesday.
Three prisoner escort and custody services staff have also tested positive for the virus.
The Prison Service has said robust contingency plans have been put in place at its facilities in consultation with Public Health England and the Department of Health and Social Care.
It said prisons are well prepared to take immediate action wherever cases or suspected cases of Covid-19 are identified, including the isolation of individuals where necessary.