Representatives for the International Criminal Court are in Libya to secure the release of a detained delegation visiting Moammar Gadhafi's captured son, reported Reuters. 

The president of the international war crimes court has also demanded the release of its four staff members.

The four were part of a mission in Libya sent to meet with deposed dictator Gadhafi's son and former heir apparent, Seif al-Islam, who was captured by revolutionary fighters in November.

Reports on Saturday said one member of the delegation had been detained after she allegedly showed sensitive documents to Seif al-Islam, who was captured by revolutionary fighters in November.

The lawyer in charge of Seif al-Islam's case, Ahmed Al-Jehani, said Saturday Melinda Taylor was visiting the captive in the mountain town of Zintan.

He said authorities took her camera and recording device before her Thursday meeting with Seif al-Islam, but that inside she shared documents they said could harm Libya's national security, including information and drawings that could endanger Libyans living abroad.