Two prisoners are being held in police custody after Subhan Anwar, who was jailed for torturing and murdering his partner's two year old daughter, was found dead in his cell, the Ministry of Justice said.
Anwar, who was jailed for a minimum of 23 years in 2009 for the murder of Sanam Navsarka, is understood to have been held hostage in a cell at HMP Long Lartin in Worcestershire before he was killed.
His partner, Zahbeena Navsarka, was cleared of her daughter's murder but found guilty of manslaughter and jailed for nine years.
More top news
Energy company E.ON and charity Age UK have temporarily suspended a branded energy deal following criticism of the deal.
A fresh inquest will be opened into the death of toddler Poppi Worthington next month.
Two murders so far in four days - and Dublin is a city fearful of what may come next.