The boy allegedly stabbed a 14-year-old in the back at Stantonbury International School on 21/1.
The boy who was injured suffered minor injuries.
In a statement issued by Stantonbury International School, they claimed that the incident was "not knife crime". Students have claimed that the weapon was a pair of scissors.
Thames Valley Police have informed us that the investigation is ongoing.
Find out more about the incident here: https://www.mkfm.com/news/local-news/milton-keynes-schoolboy-arrested-after-stabbing-fellow-pupil/