Hong Kong police have arrested a 14-year-old boy on suspicion of wounding for allegedly shoving a classmate who remains in a serious condition two weeks after the incident.
The force said on Friday that the suspect was arrested on Monday after an in-depth investigation.
The teenager was subsequently released on bail pending further investigation and was required to report to police in late July, it added.
The arrest was in connection with a report filed on July 3 about a 16-year-old boy who lost consciousness at school.
Preliminary investigations suggested the suspect had pushed the victim in a classroom, causing him to lose consciousness and need treatment at Tuen Mun Hospital.
It was understood that the incident took place at Tuen Mun Government Secondary School.
A source earlier said students were returning to their classrooms to collect their bags when the incident occurred.