Police in Helsinki say they suspect a man of putting iron nails into protein bars.
The incident took place in a central Helsinki S-market just before midnight on Friday and was captured on security camera. The sales person removed the affected items off the shelves.
Earlier on Thursday, police said they were looking for a slim man with dreadlocks and beard, but said later that the suspect had been identified thanks to tips from public.
Last month, hamburger chain Hesburger asked police to find out how needles ended up in its French fries in Lahti.