One of China's most senior politicians, who headed the National Energy Administration (NEA) until March, is under investigation, according to the state media.
Liu Tienan, 58, appears to be the latest high-profile victim of the Communist Party's ongoing anti-corruption campaign.
Mr Liu had been in charge of formulating China's energy policy and was also one of 11 vice chairmen of the National Development and Reform Commission (NDRC), the powerful modern incarnation of the old State Planning office.
He was elected to be an alternate member of the Communist Party Central Committee last November.
However, in December, a veteran Chinese journalist, Luo Changping, posted accusations on the internet that Mr Liu had abused his position to funnel money to his family.
He claimed Mr Liu's wife and son were shareholders in a private company belonging to the mainland businessman Ni Ritao that used forged documents to obtain bank loans.