Space cake, weed cookies and hash brownies may be familiar fare in the Netherlands, but cannabis in bags of children’s candy is not and Haribo has recalled its Happy Cola F!ZZ sweets after traces of the drug were found inside.

Several people, including children, suffered “health complaints, such as dizziness” after eating sweets from three 1kg packs, the Food and Consumer Product Safety Authority (NVWA) in the Netherlands said, adding that a full recall had been undertaken as a precaution.

“How the cannabis ended up in the sweets is still unknown,” a spokesperson for the authority told the Dutch news agency ANP. “The police are investigating the matter further.” The authority said the packs concerned were genuine Haribo products.