A huge explosion rocked a gas plant in central China on Friday, killing at least two people and injuring another 18, state media said.
Another 12 people were missing after the blast, said state broadcaster CCTV, which shattered windows and doors of buildings in a 3km radius.
Official news agency Xinhua had earlier said "many people" were injured by the explosion, which happened at 5.50pm local time (9.50am GMT).
Xinhua said the blast occurred in the air separation unit of the Henan Coal Gas Group factory and not in the gas tank areas, citing a source in the Yima city government. All production at the plant has been stopped.
"Many windows and doors within a 3km radius were shattered, and some interior doors were also blown out by the blast," CCTV said on its Twitter-like Weibo social media account.
Local media showed amateur videos of a massive column of black smoke billowing from the factory and debris littering the roads.
Deadly industrial accidents are common in China, where safety regulations are often poorly enforced.
In March, a blast at a chemical plant in eastern Jiangsu province killed 78 people and injured hundreds.
The powerful explosion in the eastern city of Yancheng toppled several buildings in the industrial park, blew out windows of nearby homes and even dented metal garage doors.
Authorities detained two dozen people in connection with the March 21 blast, which prompted the government to order a nationwide inspection of chemical firms.
A week after that explosion, seven died following a blast at an electronics component manufacturer in the same province.
In November, a gas leak at a plant in the northern Chinese city of Zhangjiakou, which will host the 2022 Winter Olympics, killed 24 people and injured 21 others.
Leaked chloroethylene came into contact with a fire source, causing the explosion, authorities said in a February report, which also claimed the Chinese chemical firm responsible for the accident had concealed information and misled investigators.
In 2015, China suffered one of its worst industrial accidents when giant chemical blasts in the northern port city of Tianjin killed at least 165 people.
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