MILAN, Italy -- Inter Milan was the second Italian soccer team in two days to receive a threatening letter with bullets inside the envelope.
The unsigned letter arrived Friday, telling Inter chairman Massimo Moratti to be "very, very careful," the ANSA news agency reported. The letter also insulted and threatened Inter coach Roberto Mancini and striker Zlatan Ibrahimovic, who is tied for the league lead with 13 goals.
Police confirmed the existence of the letter but would not discuss the content. Inter, which is in first place in Serie A, declined to comment.
A similar unsigned letter arrived at the offices of AC Milan on Thursday in an envelope that contained a bullet. The letter threatened Milan president Silvio Berlusconi -- the former Italian premier who leads Italy's center-right opposition -- as well as club vice president Adriano Galliani and coach Carlo Ancelotti. The team said it was not the first time such a threat had been received.
Pierluigi Collina, the former Italian referee who now selects and trains game officials, has had a security detail since November. He reportedly received a threatening letter late last year that Italian officials deemed serious.