China’s minister of emergency management, Wang Xiangxi, is under investigation for suspected “serious violations of discipline and law,” the country’s top anti-graft body said Saturday, as Beijing’s sweeping crackdown on corruption among senior officials continues.

The Central Commission for Discipline Inspection did not provide details about the allegations against Wang, a senior Communist Party official. It is relatively uncommon for a sitting cabinet minister to be placed under formal investigation.

The probe comes amid President Xi Jinping’s long-running anti-corruption campaign, which has intensified in recent months. Last week, China’s defense ministry announced it was investigating Zhang Youxia, the country’s top general and the second-most powerful figure in the military after Xi.

Earlier this month, Xi warned that corruption remains a critical threat, calling it a battle China “must not lose.” Authorities launched a record 65 investigations into high-ranking officials last year, with scrutiny increasingly extending beyond government ministries to former university leaders and executives at state-owned enterprises.

Wang, 63, assumed his current post in July 2022 after serving as chairman of the state-owned power producer National Energy Investment Corp.

The investigation underscores the continued reach of China’s anti-graft drive, even into the highest levels of the government.