Updated at 6.39pm: The Independent Commission Against Corruption (ICAC) said on Thursday it has mounted an arrest operation into allegations that some mainland citizens had acquired residence in Hong Kong through false marriages with SAR residents. They had entered Hong Kong with unlawfully obtained Cambodian passports, the ICAC said. Twenty three people were arrested in the sting operation dubbed ''Mavis,'' which commenced last week. Fourteen Hong Kong residents were among those arrested, some of whom allegedly acted as spouses in bogus marriages. The remaining nine people were mainlanders who had gained residency through this illegal method. The ICAC investigation arose from a corruption complaint alleging some government officers in Hong Kong might have accepted bribes from a syndicate for turning a blind eye to the falsely arranged marriages. Investigations have not revealed evidence of corruption against any civil servants, the ICAC said. Investigations have revealed that a syndicate had arranged for several mainlanders to travel to Cambodia via the SAR with mainland passports. After they had arrived in Cambodia, the mainlanders were supplied with Cambodian passports at a cost of $50,000 to $180,000 each. The mainlanders then re-entered the SAR as visitors with the allegedly forged or illegally obtained passports. Ten suspect Cambodian passports were seized during the operation. Upon the mainlanders' return to the SAR, the syndicate allegedly arranged fake marriages between the mainland citizens and Hong Kong residents to enable the mainlanders to apply to the Immigration Department for residency. The mainlanders were each charged a fee between several thousand dollars to $100,000 for the fake marriages. The pseudo spouses were allegedly paid by the syndicate $10,000 to $28,000 each. The 23 people arrested have been released on bail, pending further inquires.