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UPDATE 2-Billionaire Hikvision director named in Chinese disclosure probe

* Hikvision says company not directly involved in probe

* Hu, vice-chairman and 13.4% stakeholder investigated

* Company blacklisted by U.S. in October for Xinjiang involvement (Adds company comment, share price fall)

SHANGHAI, Nov 14 (Reuters) - China's securities regulator is investigating one of the country's richest men for alleged violation of disclosure rules as a director of surveillance camera giant Hikvision, the company said.

Directors Gong Hongjia and Hu Yangzhong had been named as suspects and would cooperate with the investigation by the China Securities Regulatory Commission (CSRC), the firm said in a filing to the stock exchange on Wednesday. It did not provide any detail of the alleged violations.

Gong is a Hikvision vice chairman and the firm's largest individual shareholder with a 13.4% stake, according to Refinitiv data. The Forbes China rich list puts his net worth at $9 billion, making him the 26th-richest person in the country.

Hu is Hikvision's general manager and is ranked by Forbes as the 265th wealthiest person in China with a net worth of $1.5 billion.

Reuters was not immediately able to reach the two directors.

The investigation concerned the "board member individuals" and not the company, a Hikvision spokeswoman said.

Hikvision's share price fell as much as 4.5% in morning trade, while the broader market was up 0.2%.

Hikvision, the world's biggest supplier of video surveillance systems, was one of eight firms added to a U.S. blacklist in October aimed at punishing Beijing for its treatment of Muslim minorities in the northwestern region of Xinjiang.

The firm had allegedly provided surveillance equipment to police authorities throughout Xinjiang, where China has been accused by Washington of repression, arbitrary detention and high-technology surveillance against Muslim minority groups.

Hikvision said at the time that it strongly opposed the U.S. decision and was working on contingency plans.

In May, the CSRC said it was working to improve the quality of the country's listed firms after a series of disclosures stoked investor concerns over poor governance. (Reporting by David Stanway and Brenda Goh; Additional reporting by Cate Cadell and Yingzhi Yang in Beijing; Editing by Stephen Coates)