Ethiopia's new prime minister has been urged to investigate a raft of gruesome torture and abuse allegations involving senior officials in the country's most notorious prison. Jail Ogaden, officially known as Jijiga central prison, is home to thousands of prisoners and lies at the heart of Jigjiga, the capital of Ethiopia's eastern Somali region. According to a report by Human Rights Watch ... prisoners are routinely brutalised and denied access to adequate medical care, family, lawyers, and sometimes food. Many have never been convicted of any crime. Former prisoners claimed they saw people dying in their cells after being tortured by officials. The report provides the most extensive catalogue to date of human rights abuses in eastern Ethiopia under Somali regional president Abdi Mohamed Omar, commonly known as Abdi Iley. The study documents alleged abuses including rape, sleep deprivation, long-term arbitrary detention, collective punishment and forced confessions between 2011 and early 2018. It highlights, in particular, the role of a 40,000-strong Somali special police unit known as the Liyu, which Abdi, then head of regional security, established in 2008 as part of a brutal counter-insurgency campaign targeting the Ogaden National Liberation Front, a secessionist rebel group. Most Jail Ogaden inmates are accused of some affiliation to the group. "Torture in detention is a serious problem throughout Ethiopia, but Jail Ogaden is in a class of its own," said Felix Horne, the report's author.