The Tan Duong Company workers had been served a company lunch of tuna with pineapple, sautéed cucumber and soup before getting sick. A separate group of workers at the company had eaten meat served with egg, sautéed cucumber and soup cooked in the same kitchen, but had not gotten sick.

The sick workers complained of itchiness, rashes, headaches and nausea.

Local authorities are investigating the cause of the problems.

Reported by Thanh Tung