Naga , the sister of ousted Tunisian President Zine El Abidine Ben Ali , has been arrested by the Tunisian public security forces , an official source at the Tunisian interior ministry said. She had been at large and hiden in one of Sousse houses in central Tunis .The judge of Sfax primary court has ordered to bring naga on charges of involvement in illegal activities.After weeks of popular protests and uprising, Tunisia\'s ex-leader Zine al-Abidine Ben Ali and his wife Leila Trabelsi fled to Saudi Arabia on 14 January.