It has been confirmed that three suspects arrested in Hunan for the murder of a wealthy businessman in a Central teahouse have been sent to Guangdong, raising the possibility that they could stand trial in Hong Kong. The development came yesterday as it emerged that a fourth man, believed to be one of the key plotters of Harry Lam Hon-lit's murder, was arrested in Yunan last month. Lam, 54, a director of Hong Kong-based Digger Holdings and an investor in the Mission Hills Golf Club in Shenzhen, was killed with a single bullet to the head in the Luk Yu Tea House on November 30 as he ate breakfast with three friends. Hunan police arrested the suspected gunman, Yang Wen, 25, last Friday in a rented house in Zhangjiajie city, and his accomplices, Zhang Zixin, 20, and Wu Yiwu, 23, in two other cities in the province last month. It is understood that mainland police are still hunting other key suspects. A Hunan Public Security Bureau source confirmed that three suspects arrested in the province had been sent to Guangdong, but he declined to say if they were in Shenzhen. An officer from the bureau said they sent the suspects to Guangdong for follow-up investigations as the murder took place in Hong Kong. Another officer said they would follow past practice in deciding whether to send the suspects to Hong Kong.