Police say the victims in Daura were subjected to "inhumane and degrading treatment"
The private Islamic boarding school in Daura, northern Nigeria, was not somewhere you would want a child to stay for more than a few minutes, let alone months or years.
The Koranic and Rehabilitation Centre was one of series of institutions raided over the past month where parents have been sending troublesome children and young men who may be addicted to drugs or have committed petty crimes. But the raids have revealed them to be more akin to "torture houses", officials say.
The centre in Daura, President Muhammadu Buhari's hometown, was made up of two main buildings, one clean and well-built where children were taught the Koran.Across the road was the centre's accommodation - a run-down single-storey compound, made up of five or six dark cells with barred windows and doors around a courtyard.
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The students were crammed into unhygienic accommodation that resembled cells
The air was stuffy and nauseating. Former students told us that up to 40 people were kept in chains in each 7-sq-m (75-sq-ft) cell.
