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"Ten Colombians were detained after an operation by Moscow and Saint Petersburg police in Domodedovo airport's customs," transport police chief for the northwest region Vadim Kachirin said in a press release.
The criminals were carrying some of the jewellery in their luggage, while a female accomplice wore some on her body, the press release said.
The jewellery has a value of 43 million rubles ($1.4 million, 1.0 million euros) and belongs to several Russian companies that were planning to display the pieces at an international exhibition in March. It was stolen earlier this month.