"من هرگز چنین گرمایی را احساس نکرده ام" - یک بازمانده از تماشای مرگ 33 هم سلولی در نیجریه

'I have never felt heat like that' - a survivor on watching 33 cellmates die in Nigeria

The BBC goes inside the prison where prisoners were trapped in stifling, cramped conditions.