"Rome is the cross and the West is the cross. And the people of Rome are the patrons of the cross. Muslims' target is the West. We will open Rome," the message continued.
The interpreter who provided the anti-terrorist police with an Italian version of the tape said "open" was a historic term meaning "seize through force and bloodshed by destroying and subjugating the people", Panorama continued.
Daily newspaper La Stampa said investigators were taking the threats seriously. They come nine days before the Christian world celebrates Easter.