The Paris-based group, Reporters Sans Frontieres -- which defends press freedom -- has urged the authorities in Cameroon to release a local magazine editor it says was detained on Thursday.

In a letter to President Biya, the organisation says Aime Mathurin Moussi -- of the banned magazine, La Plume du Jour -- was taken from his home in Yaounde on Thursday.

In January, a prominent newspaper editor ,Pius Njawe of Le Messager, was sentenced to two years in jail for spreading false information.