Cambodia's government said Wednesday it hopes the U.S. and Britain have sufficient evidence in their pursuit of Prince Holding Group and its Chairman Chen Zhi, after both governments imposed coordinated sanctions accusing the Cambodian conglomerate of running massive online scams and using forced labor.

Last year, American citizens lost more than $10 billion to such Southeast Asia based scammers, according to the Treasury Department, a 66% increase over the year before.

Assistant Attorney General for National Security John A Eisenberg described the Prince Group as a "criminal enterprise built on human suffering".

South Korea’s efforts are part of a widening international crackdown on criminal groups running online fraud schemes from Southeast Asia.

Malaysia and the U.S. are facilitating efforts to secure an expanded ceasefire agreement between Thailand and Cambodia that they hope will be signed during a Southeast Asian summit later month, Malay...