Cambodia's government announced Wednesday that it has arrested and extradited to China a prominent tycoon who allegedly led a huge online scam operation and was wanted by US authorities on related criminal charges. A press release from Cambodia's Interior Ministry said Chen Zhi and two other Chinese citizens were arrested and extradited Tuesday following months of investigation and at the request of Chinese authorities. Chen, a Chinese native with dual nationality, had his Cambodian citizenship revoked in December, it said. Chen, chairman of Cambodia's Prince Holding Group, was accused in October by the US Treasury Department and the UK Foreign Office of heading a transnational criminal network that defrauded victims worldwide and exploited trafficked workers. Scam centres have proliferated across Southeast Asia, swindling money from victims by convincing them to join bogus investment schemes. According to estimates from the UN Office on Drugs and Crime, scam victims worldwide lost