A couple in the town of Tvååker in western Sweden discovered glass in a package of chicken thighs they purchased on Wednesday afternoon.

The first reports of glass in Kronfågel frozen chicken breasts occurred on March 20th, prompting an initial recall of packages with an expiration date of November 16, 2009.

On Monday, the company announced a further recall of chicken breast packages with expiry dates of November 9th and November 23rd, 2009, as well as 700 gramme packages of chicken thighs dates January 15th, 2010.

Altogether, the company recalled 10,000 packages, or around 107 tonnes of chicken.

But on Tuesday, Kronfågel received more reports of glass bits in its chicken, leading to a recall of all packages of Kronfågel split chicken breasts dated between March 24th and December 7th, 2009 and all packages chicken thighs with expiration dates between March 24th, 2009 and March 4th, 2010.

Police have also been called in to investigate whether or not the matter could be an act of sabotage.

“If you find glass in a setting where there glass is prohibited, there is reason to believe it may be the result of a criminal act,” said Henrik Sundling of the Katrineholm police in central Sweden to the TT news agency on Tuesday.

And Kronfågel isn’t the only poultry producer affected by the mysterious presence of glass in packaged chicken.

At the weekend, a customer from Hässelholm in southern Sweden ended up with bits of glass in his mouth after eating a fresh chicken sold under the Ica grocery store brand and produced by poultry producer Lagerbergs.

While no connection has been established between the Lagerbergs incident and the glass found in Kronfågel’s chicken packages, the continued discovery by Swedish consumers of glass in packages of chicken has many convinced it is the result of a deliberate act.

“It’s really unsettling. It has to be sabotage. There can’t suddenly be glass everywhere,” said Lars-Göran Karlsson, head of Knäreds Chicken, to the Aftonbladet newspaper.

The head of Sweden’s main poultry association, Svensk Fågel, is also concerned, saying that the industry has never before been the victim of such widespread sabotage.

Nevertheless, she said the organization plans to wait for the results of the ongoing police investigation before taking action.