Victorian police have confirmed they are investigating two separate reports of strawberries being found with needles inside them in Melbourne's northern suburbs.

Key points: A woman went to hospital for x-rays after biting into a needle

A woman went to hospital for x-rays after biting into a needle Another instance was reported to police a fortnight earlier

Another instance was reported to police a fortnight earlier Coles said it was investigating with its strawberry supplier

Skye Wilson-Wright was celebrating her 30th birthday on Sunday night with a strawberry-topped cake when she bit into one of the berries to find a needle or pin lodged in the fruit.

The woman's mother, Lorelle Wilson, told the ABC although she avoided swallowing the metal, she was taken to Austin Hospital for x-rays because she "had a sharp pain" that did not go away.

"[We] thought she might have swallowed another needle," Ms Wilson said.

Ms Wilson said the x-rays found nothing else inside her daughter, but hospital staff were concerned she may have swallowed another foreign object.

She said the strawberries were bought at a Coles supermarket in Eltham, in Melbourne's outer-north, before being covered in chocolate by a friend and placed on the cake.

"It's shocking, it shouldn't happen, you think it wouldn't happen to you," Ms Wilson-Wright's stepfather, Dave Chapman, said.

"[I'm] just glad it wasn't anything more serious," he said.

Dave Chapman said he was relieved his stepdaughter was not more badly injured. ( ABC News: James Hancock )

Mr Chapman said his stepdaughter was in "constant pain" on Sunday night, which would rise when she swallowed, laughed or ate.

He said she was still in pain on Monday.

Police said it was the second report of food contamination in the area in as many weeks.

"Banyule Criminal Investigation Unit detectives are currently investigating two reports of food contamination in the Eltham and Fairfield areas," a spokesman said.

Police said the first report was of a needle found in a strawberry bought from a store in Fairfield, in Melbourne's inner north, on August 25 and reported to police on September 10.

The spokesman confirmed the latest case was reported on Monday.

Tough penalties in place following 2018 scare

Last year, a nationwide needle scare — when there were more than 100 reports of contaminated strawberries — led to penalties being increased for contaminating food.

The berry industry took a hit as the months-long saga dragged on, with growers claiming "hysteria" was leading to copycat crimes.

"The community is reminded that anyone found to be contaminating food products can be charged with a serious indictable offence with penalties including up to 10 years in jail," the Victoria Police spokesman said.

Police believed many of the needles found in strawberries last year were copycat cases. ( Supplied )

Police Minister Lisa Neville said the community could be assured that police took such reports "very seriously".

"These are difficult matters often to solve, but they take them very seriously given the potential risk to the industry as well as to our consumers," she said.

"Anyone who's deliberately done this will be treated with the full force of the law."

Coles said it had spoken to the customer and would follow up with their strawberry supplier to investigate the matter.

"Coles takes the safety of the food we sell seriously," a spokeswoman said.

A spokesperson for Berries Australia said the organisation was aware of the incidents and was "waiting to obtain more information".