He is not out of danger yet, but the operation went well and the doctors are optimistic . The 15-year-old student stabbed by a 14-year-old classmate yesterday in the early afternoon outside the Sergio Atzeni high school in Capoterra, is kept in a pharmacological coma in the Cardioanesthesia department of the Brotzu hospital in Cagliari , where he underwent surgery for application of a stent to an artery in the neck damaged by the blow.

Meanwhile, the 14-year-old responsible for the attack, arrested last night by the police, spent his first night in the Quartucciu juvenile prison: «My client is very shaken. It is a tragedy for all the protagonists of this story" , states defense lawyer Piergiorgio Piroddi.

"Compatibly with what happened he is fine, but he is shaken and very distressed by the whole affair", clarifies the lawyer, who is now waiting to know the date of the hearing to validate the restrictive measure, where perhaps the 14-year-old could tell his version of the facts.

Meanwhile, the investigations continue by the Carabinieri, who also today listened to students and teachers of Sergio Atzeni, to identify a possible motive. The hypothesis that has come forward is that of bullying. But not inside the school, explained principal Maurizio Pibiri.

«We have no element to support this conjecture. In the past we had received reports for other cases and intervened. On this occasion however we had no signal. The same classmates of the boys involved are very affected by the story."

Even the superintendent, who has started an investigation, confirms the words of the school director: «Nothing previously emerged inside the school that could have triggered what then happened», said the director of the regional school office of the Sardinia, Francesco Feliziani , who today met students and teachers of the Sergio Atzeni institute.

«I was in the institute and I spoke with the head teacher - Feliziani reconstructs - some meetings were organized with the kids and I took part in one of these. The two boys were well integrated and the two classes they attended had no contact with each other."