A chain of stores has apologised after inadvertently selling children's colouring books featuring an image of Adolf Hitler.
The Dutch chain of stores posted a statement on its website saying the colouring books, which went on sale this week, were immediately pulled from shelves after the discovery of an "inappropriate image".
The image shows Hitler giving a Nazi salute. On his left arm is a red band with a swastika.
Without directly referring to Hitler, the company said it is investigating how the image got into the books "despite various checks of the content".
It was not clear how many of the books were sold.