Another student (13) has been arrested.
A teenage boy has been taken to hospital following a stabbing at a school in Co. Antrim.
The incident happened at Larne Grammar School this morning, and his injuries are thought to be non life threatening.
Another pupil, a 13-year-old boy, has been arrested on suspicion of grievous bodily harm and possession of an offensive weapon, reports RTÉ.
Jonathan Wylie, Principal of Larne Grammar School, confirmed that a pupil was taken to hospital following an incident at the school this morning.
In a statement, he said: "The safety and wellbeing of our pupils is always our primary concern and the authorities, including the PSNI, were contacted immediately.
"Parents have also been contacted and we are working with the Education Authority to ensure that pastoral support is available for those who require it.
"This is the first time that an incident of this nature has occurred in school and the thoughts of the entire school community are with the injured pupil and his family.
"We are unable to comment further due to an ongoing PSNI investigation."