Police were called to two fights in Jersey last night, one involving reports of a knife.
Firearms officers were deployed to Le Geyt at around 9pm.
The force says someone reported seeing a knife. A weapon was not used, but one was located.
A 16 year boy was arrested for possessing an offensive weapon.
Earlier, at 7.45pm, police attended the Havre des Pas Lido where they arrested two teenage boys for breach of the peace.
All have been released on police bail while enquiries continue.

Jèrriais film set to hit the screens at 13th Parish Film Festival
Muratti Tickets on now on sale
Jersey Cricket men's team play at Lord's
Seabird protection outweighs visual impact after predator fence appeal
Guernsey rejects inter-island ferry proposal
The newly revealed faces and details of Jersey's past
Up to £150 for families to help with school essentials
No more funding from Guernsey for Jersey company that delivers its newspapers