Workers at a Fiat factory in Sicily went on strike Monday and blocked a railway over fears that the Italian auto giant will close the plant's car assembly line in 2012, unions and reports said. Strikers formed a picket line in front of the Termini Imerese plant in northern Sicily and blocked a railway at the Fiumertorto train station, the ANSA news agency reported. Roberto Mastrosimone, an official with the FIOM union, said the strike was 'the response of workers against (Fiat boss Sergio) Marchionne and his plan to close the plant.' The Termini Imerese plant employs 1,700 people while 400 more employees from sub-contractors depend on the factory. The plant's workers had already gone on strike twice in May over concerns about their future amid uncertainty over Fiat's restructuring plans. Fiat finalised a deal with struggling US automaker Chrysler this month to create a new global auto giant. 