Residents in Grands Vaux have reported finding crossbow bolts in a children's play area in Grands Vaux.
One man was arrested on Wednesday morning (18 September) by armed police.
The force said he was detained by firearms officers 'as part of a planned arrest'.
Police have confirmed to Channel 103 that 'a number of items were seized and secured' as part of their investigation.
Officers have been going door-to-door, visiting homes in the area to provide reassurance.
The man who was arrested has since been released on police bail.

2027 DFDS schedule details confirmed
£26,500 spent on making unstable Rouge Bouillon wall safe
HSBC CEO running New York Marathon for Jersey charity
Donations in memory of Hannah Benfield to Alderney rescue groups
Other options considered to deter drink-driving
Man completes A-Z marathon challenge in Jersey
"There should be a degree of shame attached to drink-driving"
Footage wanted from scene of serious collision