Russian customs officials have detained a German man who was attempting to cross the border from Estonia into Russia with some 13 kilograms of fine gold concealed in his caravan. The 21 gold bars, with a total value exceeding 90 million roubles ($980,000), were not declared by the 58-year-old man, Russian authorities said. The gold bars, bearing the hallmarks of a western company, were discovered during a search of the caravan and the man’s personal belongings. It was unclear how he had obtained the gold. The man was initially placed under house arrest, according to the customs statement. He n…