Cambodian police said on Thursday they arrested 57 South Korean nationals over alleged links to an online scam organisation in the Southeast Asian country.

The arrests happened on Wednesday as police raided a building on the outskirts of the capital, Phnom Penh. Police found 86 people working at the complex, including 57 South Koreans and 29 Chinese, according to a statement Thursday by Cambodia’s Secretariat of the Commission for Combating Online Scams.