Mark Yong Khong Yong, a Singaporean national whose career has been defined by high-stakes legal battles across the globe, has been arrested in Zimbabwe following a high-profile alleged mining investment fraud.
The arrest marked the latest chapter for a man whose name has frequently appeared in headlines linked to multimillion-dollar gold scams and sophisticated financial schemes.
Yong was intercepted by police at the Norton tollgate while traveling in a black Lexus SUV with three other individuals.
Following his arrest, authorities conducted a search of his residence in the upscale Borrowdale suburb of Harare, where they allegedly recovered approximately 10 grammes of suspected gold nuggets.
Authorities said they were verifying if Yong possesses the legal permits required to hold the gold.
He now faces charges of fraud, money laundering, and illegal possession of gold, stemming from an investigation into a mining investment deal where another foreign investor was allegedly defrauded of US1,5 million.
On March 16, a Harare magistrate granted him US1 500 bail.
While his current legal troubles are centred in Zimbabwe, Yong’s most significant "brushes with the law" have occurred in his home country of Singapore.
The Singapore High Court recently upheld a worldwide asset-freeze order, known as a Mareva injunction, against Yong and his associate Emily Hwang.
This court order froze the defendants’ assets to prevent them from being hidden or moved before a case is resolved.
The injunction followed an application by claimants who alleged they were induced into a fraudulent gold-trading operation spanning South Africa and Zimbabwe.
In the Singapore proceedings, senior judge Tan Siong Thye refused to lift the injunction, citing "well-substantiated allegations" that Yong was "involved in egregious acts of fraud which reveal grave dishonesty".
The court found sufficient preliminary evidence of fraud, including records of cryptocurrency transfers and inconsistencies in Yong’s explanations of his role.
The ongoing lawsuit in Singapore seeks the return of invested capital and profits totalling more than US$77 million.
Yong’s history of controversy extends well beyond Singapore and Zimbabwe.
In December 2021, he allegedly defrauded The Star Gold Coast casino in Australia of US$5 million after manipulating a sophisticated financial facility.
Yong reportedly incurred these gambling debts through a cheque cashing facility (CCF), leading the Singapore High Court to confirm that Singaporean laws do not prevent the registration of a foreign judgement based on a gambling debt.
The year 2025 was particularly litigious for Yong. In November, he and his son, Marcus Yong, were sued in Hong Kong by a Chinese businessman who alleged he was swindled out of US1.3 million in an African mining scheme.
During the same month, a Cayman Islands investment firm sued Yong and three associates for US49 million, alleging fraud involving a mutual fund group known as Coinful Capital.
Yong has long maintained a presence in the Zimbabwean mining sector.
In 2022, he was allegedly involved in a US$6 million gold scam involving a Singapore family office and an unregulated Zimbabwean entity called MasterDragon.
He was also linked to a previous court case concerning the Metallon Group, where he reportedly used his Singaporean connections to attract international business partners to Zimbabwean gold deals.
As Yong awaits further proceedings in Harare, his global legal entanglements continue to mount.
From sophisticated casino scams in Australia to massive gold trading frauds in Singapore, the arrest in Zimbabwe highlights a persistent pattern of alleged financial misconduct that spans multiple jurisdictions.
