Interior Minister Giuliano Amato said he was sending 1,000 more police officers to Naples, Italy’s third biggest city and home to the Camorra version of the Mafia, to combat a crime wave. Three more people were killed yesterday, bringing the number of homicides since Friday to seven. The spate of murders and armed robberies in recent weeks has prompted some politicians to call for the army to step in to reinforce the Naples security force of 13,000. Prime Minister Romano Prodi did not rule out the idea and said any solution would have to bring long-term benefits. “This time the fight against crime will not be carried out to soothe public opinion for a few days or a few months, but it will be a permanent fight to bring safety to the citizens,” he told reporters.