The military periodically frees prisoners from Abu Ghraib, which was also notorious as the site of executions and torture during Saddam Hussein’s regime.
On Saturday, the US military released 293 detainees from Abu Ghraib, and had announced that 475 prisoners would be released on May 21.
Four US soldiers accused of abusing Iraqi prisoners will appear in a military court in Baghdad tomorrow.
The military is still sending detainees who are considered security risks to Abu Ghraib.