Algerian courts have handed heavy jail sentences to three opposition activists whose Facebook posts they deemed potentially damaging to the national interest, human rights groups said Wednesday. Soheib Debaghi was sentenced to one year in prison on charges of encouraging an illegal gathering, insulting an official body and publication of potentially damaging material, the National Committee for the Release of Detainees (CNLD) announced on its Facebook page. Human rights group Amnesty International said two other activists, Larbi Tahar and Boussif Mohamed Boudiaf, were handed 18-month prison sentences by a court in the western town of El Bayadh, also for posts on Facebook. ad-agr/sc/kir/fz