More than 300 men and boys were freed from an Islamic boarding school known as a "house of torture." They were detained and raped by staff for years in Kaduna, Nigeria.
Many of those who were found were chained up and most of the detainees were children. They had been tortured, sexually abused and unable to leave the facility.
On Thursday police raided a building in the city where the victims had been kept in "the most debasing and inhuman conditions in the name of teaching them the Koran and reforming them", according to the spokesman.
After their release there were photos that showed the horrific scars on the backs of the victims. Their hands and feet were in chains.
More on the story from Daily Mail:
Kaduna state's chief of police Ali Janga said it was a case of 'human slavery' and they raided the house after an anonymous tip-off on Thursday.
He told the BBC it was a 'house of torture' with men and boys from Burkina Faso, Mali and other African countries.
Police said the detainees were from Burkina Faso, Mali and other African countries.
The victims, including adults and minors, were kept in 'the most debasing and inhuman conditions in the name of teaching them the Koran and reforming them', Kaduna state police spokesman Yakubu Sabo said.
The school, which has been operating for a decade, enrolled students brought by their families to learn the Koran and be rehabilitated from drug abuse and other illnesses, police said.
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While these poor men and boys have suffered irreparable damage, at least they have been rescued and are no longer suffering.