Police probe after QR-code stickers appear on 1,000 Munich graves

Police in Munich are investigating after more than 1,000 stickers were put on gravestones and wooden crosses at three cemeteries in the German city, without any indication of where they came from or why.
The small stickers are printed with a QR code, that, when being scanned, shows the name of the person buried in the grave and its location in the cemetery — but nothing else.