Three workers died and 11 others were injured in a steel plant accident in central China's Hubei Province on Saturday, local authorities said.
The workers were poisoned by gas at about 3 p.m. while repairing a boiler in the heating power workshop at Echeng Iron and Steel Co., Ltd. in Ezhou City, said a city government spokesman.
They were hospitalized immediately, but three later died despite medical efforts. Another seriously poisoned person was in critical condition, doctors said.
Rescuers turned off the boiler valve in time so no more gas escaped.
Provincial Governor Li Hongzhong ordered the provincial health department assist in the medical efforts and asked them to do all they could to save the workers.
An investigation is underway.
The company, under Wuhan Iron and Steel Group, is on the southern bank of the Yangtze River, about 40 km from the provincial capital Wuhan.