Syrian authorities abused and left detainees to die at a Damascus military hospital, using the facility to cover up the torture of prisoners, a rights group and former detainees said.

Sick prisoners sent from detention facilities to the capital's Tishreen Military Hospital for treatment rarely received any medical attention, according to a report released Tuesday by the Association of Detainees and the Missing in Sednaya Prison (ADMSP), a Turkey-based watchdog.

Instead, security forces at the hospital jail and even medical and administrative staff inflicted "brutal torture" on detainees, including physical and psychological violence, according to the report titled "Buried in Silence."