(ANSA) - BELGRADE, 11 SET - During an attack this morning at a high school in Zagreb, a 14-year-old student stabbed another student and a school staff member, injuring both. The incident occurred shortly after 8:00 a.m. at a school in the Voltino district, on the outskirts of Croatia's capital. The injured student is in serious condition and has undergone surgery, but he is no longer in danger of death. The staff member received less serious injuries. Police have detained the attacker, who is also a student at the school. Initial reports indicate that the two students had a disagreement the day before. (ANSA).