As of 2011, it was holding about 20,000 prisoners, of which 13,000 were held on drug-related charges - said to be four times its planned capacity.
In March 2011, it made headlines when, according to official reports, 14 people were killed and 33 wounded during a prison revolt.
Former prisoners report torture and physical abuse by the staff, catastrophic hygiene conditions, and a lack of medical care.
One hundred fifty people are said to have suffered serious injuries, and several dozens to have been killed.
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