Meanwhile chicken dishes are being taken off menus across Sweden.

Police in Södermanland in southern Sweden turned to the security police on Tuesday for assistance in solving the mystery surrounding the suspected sabotage of poultry producer Kronfågel’s plant in Valla.

Furthermore it was announced on Wednesday that the National Investigation Department (Rikskriminalen) would be taking over the investigation.

“The national police commissioner has today decided that the National Police Board coordinate the investigation into the glass found in chicken products,” said Varg Gyllander at the department on Wednesday afternoon.

As a result of the glass finds, more than 900 tonnes of chicken have been recalled across Sweden since the reports began to emerge on March 20th. Since then 17 cases have been reported with 13 of the cases traced to Kronfågel’s factory in Valla.

“In view of developments it could be advisable to work together in order to more easily detect a pattern.”

The Local reported on Tuesday of the latest incident in a restaurant in Piteå in the far north of Sweden when a lunch diner found a piece of glass in his chicken curry.

Following the latest discoveries food preparation firms across the country are taking no chances.

Medirest, the firm that supplies food to hospitals in Lund and Malmö, has removed chicken from its menus. Medirest typically sells 40,000 portions daily and has returned all its poultry to Kronfågel.

The same applies to Eurest, which operates 75 staff canteens across Sweden.

Several councils in the southern Sweden province of Skåne have elected to suspend the serving of chicken.

Furthermore no chicken will be served in Malmö’s schools and pre-schools until further notice.

“One has to be attentive to all the alarms that turn up and see what happens, as we have responsibility for so many meal portions,” Gunilla Berggren at Malmö Skolrestauranger told news agency TT.

Stockholm South Hospital has also followed suit and has removed chicken from patient and staff meals.

Despite the unceasing alarms Kronfågel is continuing to produce its chicken as normal and has no intention of recalling any more products.

“After a long discussion we have concluded that it does not help to recall the Kronfågel products. It will not put a stop to this,” Jenny Fridh at Kronfågel explained.

The firm has however tightened security at its production facilities.

Jenny Fridh was unwilling to confirm the locations of the new alarms.

“What I can say is that the new returns to be analyzed lack a red thread, a connection. We can now see that we are dealing with a range of products, from different producers and from difference countries – Denmark, Germany and Sweden.”