Libya says it will appeal a ruling by the International Criminal Court ordering it to hand over Saif al-Islam Gadhafi, the son of former ruler Moammar Gadhafi.
Judges at the ICC on Friday rejected Libya's claim that the tribunal has no right to try Gadhafi because Tripoli intends to try him. Libya argues that the international court can intervene only if the local legal system is not up to the task.
ICC judges said Libyan government lawyers have not proved that their authorities are investigating the same crimes as the international prosecutors. They also questioned whether Libya has full custody over Saif al-Islam, something it would need if it were to try him.
The 40-year-old son of the former dictator is being held by rebel captors in the western mountain city of Zintan, where the power of the central government is weak.
The ICC wants to try him for alleged crimes committed during the 2011 uprising that toppled his father.