Expanding an investigation into a transnational diamond smuggling ring involving 30,000 stones, police have named four suspects who funneled more than 3,400 of them into Vietnam's largest precious metals firm, Saigon Jewelry Company.

Over 30 people accused of smuggling 141 shipments from India, Hong Kong

Expanding an investigation into a transnational diamond smuggling ring involving 30,000 stones, police have named four suspects who funneled more than 3,400 of them into Vietnam's…