Police were yesterday called to a Methodist church on Wesley Street in Redruth following reports of a suspicious device located in the church grounds.
Cordons were put in place whilst the bomb squad assessed the scene but have now been lifted.
A 20-year-old man from Redruth was arrested and taken in to police custody but has been released under investigation.
Explosive experts inspected a property in Wesley Street, believed to be used by the man who was arrested.
This incident is not believed to be related to terrorism.