A teenager has been arrested after he was spotted with a knife outside a city college.
Thames Valley Police said armed officers were called to Milton Keynes College on Chaffron Way at around 10:20 GMT on Thursday.
A 17-year-old boy from Milton Keynes was arrested on suspicion of possessing a knife in a public place and remained in police custody.
Officers said there was not a wider threat to the public.
Milton Keynes College confirmed on social media that it was advised to "lock down" by the police but the campus had later reopened.