The controversy swirling around 3D-Gold Jewellery Holdings grew yesterday, after a Japanese bank filed a lawsuit against a subsidiary of the precious metal giant to retrieve almost HK$24 million worth of gold bars. The Bank of Tokyo-Mitsubishi UFJ said Hang Fung Jewellery owed it 10,000 gold bars or the equivalent in cash as part of a trust receipt arrangement. A bank issues a trust receipt to a company on goods to be used in its business, but the goods remain the property of the bank. Hang Fung Jewellery is a subsidiary of 3D-Gold Jewellery Holdings, which was formerly known as Hang Fung Gold Technology. The bank's writ came a week after police said they were investigating allegations that a company executive stole HK$200 million from 3D-Gold Jewellery Holdings, whose solid gold toilet is listed in Guinness World Records as the world's most expensive. Last month, company chairman Lam Sai-wing, 53, was found dead at his Bowen Road home. The company said a number of its banking trust receipts, gold loans, revolving loans and term loan facilities had gone into technical default because of Lam's sudden death and might be terminated. The value of those loans amounted to HK$422 million. It was unclear whether the gold bars listed in the bank's writ were included in the loans that are on the verge of default. Lam founded the 3D-Gold company after moving from Guangdong to Hong Kong when he was 21, and grew the company into one of the city's biggest manufacturers of gold and other precious metals products. The firm's HK$38 million gold toilet was inspired by Russian revolutionary Vladimir Lenin. The Marxist leader, Mr Lam's boyhood hero, once said gold should be used to make toilets when socialism triumphed. Meanwhile, the Commercial Crime Bureau said last week that it had launched an investigation into the theft allegations against an unnamed company executive.