Amnesty torture fears for missing Al Jazeera journalists
Amnesty International calls for journalists' release.
Amnesty International has called on Colonel Gaddafi to release four Al Jazeera journalists held for more than two weeks after being detained trying to leave Libya.
The international human rights charity said the two correspondents and two cameramen who were arrested in Zantan, near the Tunisian border, and could be at risk of torture.
The missing correspondents are Ahmad Val Wald-Eddin from Mauritania and a Tunisian, Lutfi Al-Massoudi - both 34 years old.
Norwegian cameraman Ammar Al-Hamdan, 34, has also been detained along with Ammar Al-Tallou from Britain.