Fact that have been released by an union source: aircraft was advised by Algerian ATC (or someone claiming to be, on ATC frequency) of a bomb threat, and ordered to land at Bejaļa, Algeria, with threat of intercept. The crew saved time until the FIR boundary with France, while contacting AF operations. Operations declared the threat as "non credible ". Flight was then continued to destination with a French air force escort.
Must have been an Algerian political opponent on board...