Thieves were dressed like police and threatened air crew at gunpoint , prosecutor says . Gang of eight takes only minutes to steal the rough and polished stones from a plane 's cargo hold . They breached the periphery and drove off with their haul in 2 vehicles , the spokesman says . The Antwerp World Diamond Centre has on average $ 200 million in stones coming in and out daily , and it takes security very seriously , a spokesman told CNN . The stones were en route from Dubai to Geneva , Switzerland , Antwerp diamond dealer says .
Thieves were dressed like police and threatened air crew at gunpoint , prosecutor says . Gang of eight takes only minutes to steal the rough and polished stones from a plane 's cargo hold . They breached the periphery and drove off with their haul in 2 vehicles , the spokesman says . The stones were en route from Dubai to Geneva , Switzerland , Antwerp diamond dealer says .