The Queensland Police Service said it was investigating the contamination relating to sewing needles inserted in strawberries.
We are working closely with authorities as they investigate this matter.
"They are also contacting the supplier, the police and health and safety", Gane stated.
"At this time, the Queensland Strawberry Growers Association have reason to suspect that a disgruntled ex-employee may have orchestrated the occurrence, wherein sewing needles were found in a number of strawberries in Queensland and Victoria", the statement reads.
She referred to the problem as "an isolated incident" and "sabotage".More news: Govt will maintain 3.3% fiscal deficit target: Jaitley
"I now say given that there's been these additional incidents, unrelated to that particular product, my advice is to be ultra cautious and simply cut up those strawberries before consuming them".
Acting Queensland Chief Superintendent of the State Crime Command Terry Lawrence said the evidence indicates the act was "obviously" meant to injure others.
Queensland chief health officer Jeanette Young has also given a fresh warning - advising anyone who bought Berrylicious and Berry Obsession strawberries in Queensland, NSW or Victoria early last week to cut them in half before eating them.
'If you are in doubt, just throw them out'.
It comes after a fourth contaminated punnet was bought at a store in Central Queensland and there was a potential copycat incident at a Coles west of Brisbane.
Then she instantly realised that she had sent strawberries from the same punnet to school in her older son's packed lunch.More news: Aggies more valuable than Longhorns
A thin metal object, possibly another needle, was found in a punnet in Gatton.
"So far, NSW Police Force has received reports of contaminated strawberries purchased at supermarkets at Tweed Heads, Taree, and Wingham".
"People are contacting us out of concern and saying: 'This is what I've got, what do you think?'", he said.
However, Chief Superintendent Lawrence said the police investigation was ongoing and detectives were examining every part of the supply chain to find the contamination source.
"As with all farmers who produce food for our nation, strawberry growers strive to ensure the quality, security and freshness of their produce and these spiteful incidents have been extremely disheartening and troubling", the association wrote in a statement. "We're not agreeing with that at all at this particular point in time; our investigation is still open", he said.
On Wednesday, a Queensland woman narrowly avoided feeding contaminated strawberries to her son, posting photos of the fruit online.More news: Buckeyes edge TCU in neutral site thriller
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, by calling 1800 333 000 or via crimestoppersqld.com.au 24hrs per day.