Zhang Yujun, assistant chairman of China Securities Regulatory Commission, is being investigated for "severe disciplinary violations," the Central Commission for Discipline Inspection of the Communist Party of China said on Wednesday.

File photo show Zhang Yujun, the assistant to the chairman of China's securities regulatory commission. [Photo: jfdaily.com]

No further details have been revealed yet.

This comes amid the central authorities intensifying its probe into irregular market trading.

On Tuesday, several senior executives from CITIC Securities were confirmed as being probed by police.

The three senior staffs, including the brokerage's general manager, are being investigated for insider trading and leaking information.

CITIC Securities is China's largest brokerage.