Two of Hong Kong's most wanted men were deported from China yesterday in connection with the murder of businessman and ICAC witness Tommy Chui To-yan in Singapore last year. Chief suspect Johnny Cheung Wai-ming and alleged accomplice Wong Kwong-kai were handed over just after 5 pm. 'They were returned to Hong Kong from the mainland via Lok Ma Chau border crossing with the assistance of Interpol,' an Independent Commission Against Corruption spokesman said. Cheung, 38, was arrested in Beijing in April last year. Wong was detained in February in Guangzhou. The ICAC said no charges had been laid and it was seeking legal advice from the Attorney-General's office before proceeding. The deportation followed months of stalled extradition negotiations. Singapore has also been seeking Cheung, a former Hong Kong prison officer, to face a murder charge. At least two other suspects are still being hunted over the killing of Chui, who was to be the key prosecution witness in an $8.5 billion cigarette smuggling case.