Police and forensic investigators are examining items from a fake bomb left in a bag in Batemans Bay on March 4.
Police told the Bay Post/Moruya Examiner the bag contained a note with the word "Boom!", wires, a clock and batteries.
Sergeant Mark Dudley was in command at the scene.
"There was the wording "boom", there was a clock in there, there was a battery, there was wires, so everything to give us … concern," he said.
The bag and its contents were removed from the scene under the supervision of the NSW Police bomb squad after being X-rayed.
READ MORE: Bomb threat: Bay CBD cordoned off
The bag was reported in a shrubbery in the walkway between Perry and Orient St at about 8.50am.
"We received information there was a suspicious bag," Sergeant Dudley said.
"Items in that bag gave us suspicion of an improvised explosive device.
"We took all precautions and cordoned off the area."
He said it was "definitely a deliberate hoax".
"We've taken those items as exhibits and they're going to be followed up forensically for possible matches," he said..
Sergeant Dudley said he was unsure of the motive behind the hoax.
Asked if the person who packed the bag wanted police to believe there was a risk, Sergeant Dudley said: "That's right."