BEIJING, July 19 (Reuters) - Two of 14 workers who have been trapped in a flooded highway tunnel for five days so far in the southern Chinese city of Zhuhai were found dead, the city government said on Monday. Early on Thursday, water suddenly leaked into the Shijingshan tunnel, which is being built under a reservoir, trapping the workers more than a kilometre from the entrance. On Monday afternoon, rescuers found the two dead workers at about 1,060 metres (1,159 yards) and 1,070 metres from the tunnel"s entrance, the Zhuhai government said on its official WeChat account. As of 9:00 am (0100 GMT) on Monday, rescuers were 732.9 metres into the tunnel, but were still 427.1 metres from where the workers were trapped, the official Xinhua news agency said. The vast tunnel, while still under water, had seen its overall water level drop by a total of 15.5 metres by then, Xinhua said. Divers have been conducting searches for a total of 16 hours, it added. The accident was the second in the tunnel since March, when a collapsed wall killed two workers. The tunnel is part of a major expressway in Zhuhai in Guangdong province, linking the coastal city to a bridge to neighbouring Macau and Hong Kong. (This story has been refiled to correct grammar in headline, no change to text of story)