UPDATE 3-Hong Kong Kwok brother tycoons "arrested for graft"
* Kwoks own Hong Kong's second-biggest family fortune
* Lawyer says no charges brought despite arrest
* ICAC does not identify those arrested
By Alex Frew McMillan and Joy Leung
HONG KONG, March 29 (Reuters) - Hong Kong's Independent Commission Against Corruption on Thursday arrested two senior company executives, identified in the media as Sun Hung Kai Properties tycoon brothers Raymond and Thomas Kwok, for corruption, it said.
The Kwoks own $18.3 billion, the second-biggest family fortune in Hong Kong, according to Forbes magazine, second only to Asia's richest man, Li Ka-shing, founder of rival developer Cheung Kong (Holdings).
The ICAC also said it had arrested a former senior government official, whom the South China Morning Post identified as former chief secretary Rafael Hui, who has worked as a special adviser to Sun Hung Kai.
Sun Hung Kai said it would issue a statement shortly.
The ICAC announced on its website that the people arrested, whom it did not identify, were "alleged to have committed offences under the Prevention of Bribery Ordinance and misconduct in public office".
"Two senior executives of a listed company in Hong Kong and a former principal official of the Hong Kong Government have been arrested for suspected corruption," the ICAC said in a statement.
Gary Plowman, a former government prosecutor, said he had been to the ICAC and was representing one of the arrested parties whom he declined to identify.
"Nobody has been charged," Plowman said. As for what happened next, that was "a very good question".
"We react, we're not proactive. We are reactive in these situations," he said.
The ICAC was set up in 1974 to root out what was seen as widespread corruption in the Hong Kong government at the time, especially in the police.
It acts as a law-enforcement agency, able to arrest and detain suspects, and prosecutes cases in conjunction with advice from the Department of Justice.
Steve Vickers, former commander of the police Criminal Intelligence Bureau and now CEO of a risk and security consulting company, said the timing of the case was interesting, in the context of popular sentiment against property developers and rising house prices.
"These cases are notoriously difficult to prosecute," he said. "It will be interesting to see whether charges emerge or not."
The ICAC said another senior executive of the unnamed listed company and four others were arrested at an earlier date in connection with the case.
ARRIVAL BY LIMO
Over the past four decades, Sun Hung Kai, listed in 1972, has built some of the city's most expensive property, including luxury hilltop apartment blocks and harbour-front skyscrapers, including Hong Kong's tallest building, the International Commerce Centre on the Kowloon peninsula.
The company said 10 days ago that Thomas Chan Kui-yuen, a Sun Hung Kai Properties board member and the executive responsible for project planning and land acquisitions, had been arrested for suspected bribery.
Cable TV footage on Thursday showed Raymond Kwok entering the ICAC premises in a limousine, flanked by two unidentified men. The station also showed images of a lawyer for Thomas Kwok going into ICAC headquarters.
It was not clear if the suspects were being held.
Shares in Sun Hung Kai Properties were suspended in Hong Kong on Thursday, as was trading in two of its subsidiaries, mobile phone company SmarTone Telecommunications and data-centre operator SUNeVision Holdings.
Raymond Kwok is chairman of all three, the only person on the board of all the companies suspended.
The Kwoks took the helm at Sun Hung Kai after a bitter family feud in 2008, which ended with eldest brother and then-chairman Walter Kwok Ping-sheung being demoted.
One analyst, who did not want to be identified given the sensitive nature of the issue, said any involvement of Hui, chief secretary from 2005 to 2007, suggests the case dates back many years.
"It has to be a very old project," the analyst said.
On Thursday, the Hong Kong stock exchange suspended Sun Hung Kai, SmarTone Telecommunications Holdings and SUNeVision Holdings Ltd, ahead of what the companies said was a potentially price-sensitive announcement.
Sun Hung Kai was down 1.51 percent before the suspension, while SUNeVision was down 0.88 percent. SmarTone had been trading up 2.2 percent before trading was halted.
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