Israel's Mossad provided intelligence leading to the arrest on Sunday, of an Iranian man suspected of planning a mass casualty attack.
German police have taken into custody a 32-year-old Iranian citizen suspected of having procured deadly poisons cyanide and ricin to commit an "Islamist-motivated" attack, authorities in western Germany said on Sunday.
Israeli sources confirmed the Mossad's involvement after German Bild news paper reported a friendly nation's intelligence agency provided critical information.