Four employees of a state-owned Chinese company died in a riot in Vietnam, the firm said, doubling the previously announced toll with tensions simmering over a territorial dispute between the two countries.
The violence last Wednesday left another 126 of its workers wounded, the China Metallurgical Group Corporation (MCC) said in a statement.
DNA analysis is under way to identify two of the dead, the statement late on Tuesday added.
Beijing has previously said two Chinese nationals were killed when enraged mobs torched or otherwise damaged hundreds of foreign-owned businesses in Vietnam last week.
Relations between the Communist neighbours have plummeted after the eruption of anti-China rage in Vietnam over Beijing’s controversial plans to drill for oil in contested waters in the South China Sea.