The confirmed cases happened in Queensland and Victoria, police said, adding that the brands are sold at locations in Queensland, New South Wales, Victoria and the Australian Capital Territory.
Queensland Police and Queensland Health held a joint press conference announcing the two affected strawberry brands, Berry Obsession and Berry Licious, have been completely removed from Queensland supermarket shelves.
Burpengary man Hoani Hearne was treated in hospital after eating a strawberry with a needle inside.
Angela Stevenson, from Gladstone, told Seven News her nine-year-old accidentally bit into one of the contaminated strawberries after she packed them for his school lunch.
Contaminated strawberries were also found in Yarram and Ballarat, in Victoria, prompting urgent recalls of the two brands in Queensland, NSW and Victoria.
Queensland Police Service's Detective Acting Chief Superintendent Terry Lawrence encouraged anyone with information that could help the investigation to call Crime Stoppers on 1800 333 000.
"We want everybody to check their strawberries before consuming them ... just cut them up, have a look", Supt Lawrence said.
"Just posting this as a warning to anyone that has bought strawberries (Berry Obsessions) from Woolworths recently", Gane wrote on September 9.
They suspect the Love Berry, Delightful Strawberries and Oasis labels have also had sewing needles inserted in them.
Chantal Faugeras posted on Facebook that she purchased the punnet from Wingham Coles on Wednesday, with three needles found inside three strawberries.
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The Queensland Strawberry Growers Association believes a disgruntled farm worker may be responsible but police say they are investigating all aspects of the strawberry transit process.
"A lot of the social media that we're seeing, people are being very supportive and really - hopefully - understand that this is an isolated incident", Rowling said.
Three more cases of needles and pins found in strawberries have been confirmed, with six brands now believed to be affected.
Queensland's Chief Health Officer Dr Jeanette Young has requested retailers withdraw all Donnybrook strawberries through a trade level recall.
"I don't know anything, at this stage, I don't know anything, I'm like you guys, I want to find out".
Police warned consumers to dispose or return punnets of two brands of strawberries.
"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.
"Strawberries are a great fruit, and people should continue to buy them, but everyone should simply cut them up".
A Coles spokesperson told Starts at 60: "Coles takes the safety of the food we sell seriously and we are working with our suppliers, police and state health regulators to investigate".