Police were called to the intersection of Prominent Road and Splendour Circuit, Diggers Rest, for a report of a suspicious device attached to a sign post on February 10.
The police response resulted in traffic diversions and a number of residents temporarily displaced until the area was declared safe.
The device was assessed by police specialist units and declared not to be a risk to the community.
Following a letterbox drop and assistance from the community three males handed themselves into police.
A 27-year-old old Diggers Rest man, a 29-year-old Sunbury man and a 25-year-old Hoppers Crossing man are assisting police with their investigation.
