<sod >He added: 'If we don't describe him as a hero, I don't know what you need to do to be a hero. It's a word I think is appropriate for him in such tragic circumstances.' The Islamic State group has claimed responsibility for the attack.< eod>< sod > He added: 'If we don't describe him as a hero, I don't know what you need to do to be a hero. It's a word I think is appropriate for him in such tragic circumstances.' Beltrame's mother, who has not been named, she was unsurprised her son would put others' lives before his own.< eod>