A German restaurant owner is in hot water for allegedly marking playing cards with radioactivity to rig games.

Berlin police said the 41-year-old woman daubed Iodine-125 on specific cards, which allowed them to be identified by a gambler with a concealed detector.

Police got on her trail after radioactive card fragments were found during a routine inspection of a bin lorry at a waste treatment plant a year ago. Officers said Iodine-125 is commonly used for medical purposes and only poses a health risk through direct contact with no protective clothing.

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