A man imprisoned in Egypt died last year after being subjected to torture by prison guards, a local rights monitor said on Monday.
Hossam Aboul Abbas Moustafa Morsi died on 17 August after being beaten and electrocuted for five hours by officers, according to testimonies collected by the Egyptian Network for Human Rights.
Aboul Abbas was allegedly denied medical treatment following the abuse, the group said.
The 26-year-old was transferred to Al-Wadi Al-Jadid prison in the Western Desert less than two weeks before his death, the NGO reported. Security services reportedly informed his family on 19 August but did not disclose the cause of death.
The death of Aboul Abbas "does not reflect the full magnitude of the tragic reality experienced by thousands of criminals and political detainees in Al-Wadi Al-Jadid prison", the organisation said, describing it as "one of the worst and most cruel in Egypt".
It called for an immediate and independent investigation into his death to hold those responsible to account.
Aboul Abbas was arrested on 2 June 2024 and subjected to enforced disappearance for six weeks before the prosecution decided to place him in pre-trial detention.
He was then held at Kharga police station before being transferred to Al-Wadi Al-Jadid prison on 7 August.
Aboul Abbas had previously been arrested after authorities found videos on his phone of detained Islamist politician Hazem Salah Abu Ismail and the late preacher Abdul Hamid Kishk.
Authorities in Egypt have detained thousands of political prisoners, many of whom are held indefinitely in pre-trial detention.
Rights groups have documented a sharp rise in abuses against prisoners since President Abdel Fattah al-Sisi came to power in 2014.
The Egyptian Commission for Rights and Freedoms said in April that more than a dozen detainees had died in Egyptian prisons so far in 2025, most of them political prisoners.
'Medical negligence' was described as the leading cause of death by the rights monitor.
Amnesty International has said that prison officials subject political detainees to cruel and inhuman conditions and deny them access to medical care.