ROME, Aug 31 (Reuters) - Naples fans fought with police and railway workers when they boarded a Rome-bound train without tickets on Sunday, police and railway officials said. Passengers were forced to disembark, four railway workers were slightly injured and the interiors of several carriages were damaged. The fans effectively occupied the train in Naples and, after they refused to get off, police advised regular passengers to disembark and take other trains. Police ordered the train with the fans to leave Naples for public security reasons, the railway officials said. The train left some three hours late and more minor scuffles were reported outside Rome's Olympic stadium between police and Naples fans. Passengers, who had to change their plans, were outraged. 'It is disgusting that a group of thugs could be allowed to do this to us,' one woman who had to change her travel plans told an Italian television station.