That's according to documents seen Saturday by The Associated Press. Rendition is the process of abducting and moving a person from one nation to another.
The intelligence documents, which were found in Tripoli, provided new details on the ties between Western countries and Gadhafi's regime. Many of those same countries backed the NATO attacks that helped Libya's rebels force Gadhafi from power.
Meanwhile Libya's opposition leader says rebel forces will lay siege to pro-Gadhafi cities until a deadline for their surrender expires Sept. 10.
The head of the National Transitional Council said the rebel military is supplying humanitarian aid to the cities but will maintain a siege until the towns surrender.
Saturday, rebel fighters closed in on one of Gadhafi's last strongholds, the remote desert town of Bani Walid. A rebel commander said the town's tribal elders have been given until Sunday to surrender.
The Associated Press contributed to this report.