A 59-year old man who was arrested in relation to a bullet which was sent to Tobermore Primary School has been released from custody pending a report to the PPS.
Following searches in the Tobermore area on Thursday (June 12) police made the arrest and seized cash and ammunition.
In March this year a bullet was posted to the school in a letter along with a sympathy card.
A PSNI spokesperson said the investigation centred on an intimidating letter reported to police on March 3.
Police said they are treating the incident as a hate crime.