An Italian minister says a second autopsy on the body of an Italian found slain in Egypt reveals that the doctoral student suffered "inhuman, animal-like" violence.

Official results, still partial, are being relayed to Rome prosecutors who are investigating Giulio Regeni's death as a murder. Italian media, reporting on the autopsy completed Saturday night after the body arrived in Rome, say coroners have concluded that Regeni's neck was twisted or struck, breaking a vertebra and leaving him unable to breathe.

Interior Minister Angelino Alfano said Sunday on TV that he saw the autopsy results and Regeni suffered "something inhuman, animal-like, an unacceptable violence." Italy's ambassador in Cairo has said Regeni had been badly beaten and showed torture marks.

Alfano said it's in Egypt's interest to cooperate in the investigation.