The Supreme People's Procuratorate said in one-line statement that it has placed restrictions on the movements of Hao Weiping, chief of the nuclear power bureau, and Wei Pengyuan, deputy chief of the coal bureau.
State media have reported that investigators found as much as 1 billion yuan (USD 160 million) in cash at Wei's home. Wei's coal bureau overseas policies to make coal a cleaner source of energy.
The announcement comes a year after the director of the energy administration, Liu Tienan, was fired over corruption allegations. An investigation of Liu is continuing.