TUNIS - A Tunisian man has died after setting himself on fire to protest unemployment, an official said Tuesday, a year after a fruit-seller's self-immolation sparked the Arab Spring. The protester's death on Monday underscores growing pains in the north African country following decades of iron-fisted rule by Zine el Abidine Ben Ali, ousted last January. Ammar Gharsalla, a 48-year-old father of three, had taken part in a sit-in outside a government office in the central town of Gafsa, the epicentre of a 2008 uprising that was brutally put down by the Ben Ali regime.