Police arrested a Tunisian suspected of working for an al-Qaida-linked Iraqi extremist group as he tried to board a train Monday in Milan, headed to an Italian town where he worked as a librarian in a mosque. The suspect, identified as Nourredine Drissi, had been wanted in Italy on international terrorism charges for alleged links to Ansar al-Islam, said police from the special operations squad of the paramilitary Carabinieri. U.S. officials believe Ansar al-Islam is linked to Osama bin Laden’s terrorist network. The suspect arrived at the Milan airport from Tehran early Monday with his wife and three children, police said. He headed to Milan’s central station to catch a train to Cremona, where a month earlier another Tunisian, an imam at a mosque in the northern Italian town, was arrested. Full Story