Another 475 prisoners will be released in May, the military said.
Second, all prisoners will be released within the coming week.
In the second stage, which took place two months later, another 550 prisoners were released.
The Government said 352 more prisoners would be released later this week.
Since 1983, 2,879 prisoners have been released under the court system's program.
These prisoners have since been released in the face of international pressure.
The final two prisoners were released on 23 March 2011.
Have all political prisoners been released, as required by law?
Of the prisoners released today, the officials said, 640 were in that group.
It has provided little information and released only a few prisoners.