A Carabinieri paramilitary police officer rings the bell at the entrance of the Swiss Embassy in Rome on Thursday, Dec. 23, 2010, where a package exploded and wounded an embassy staffer, police said. (AP Photo/Angelo Carconi)

Photo by: Angelo Carconi

A Carabinieri paramilitary police officer rings the bell at the entrance of the Swiss Embassy in Rome on Thursday, Dec. 23, 2010, where a package exploded and wounded an embassy staffer, police said. (AP Photo/Angelo Carconi)