A Chinese county party chief is under investigation for alleged disciplinary violations, months after he visited a local coal mine where a deadly gas explosion later killed 82 people.

A county-level Communist Party chief in China’s central Shanxi province was put under disciplinary review, 11 days after a deadly gas explosion at a local mine killed 82 people and left two missing. Zhao Yongjin, party secretary of Qinyuan county in Changzhi, Shanxi, was “suspected of serious violations of discipline and law”, the Shanxi provincial discipline inspection and supervisory commission, an anti-corruption watchdog, announced on Tuesday night. The blast took place at the Liushenyu Coal...