The turnout for a referendum in Algeria on Sunday to revise the constitution, which the regime hopes will neutralise a protest movement, was 23.7 percent, electoral commission chairman Mohamed Charfi said, a historic low for a major election. The "yes" camp was almost certain to win after the Hirak protest movement called for a boycott, but the dismal participation could represent a setback for President Abdelmadjid Tebboune, currently hospitalised overseas. ad-agr/lpt/dl/st