Zhu Zuoli, a senior political adviser of Shaanxi province, becomes second high-level official probed in last 24 hours, following Ji Wenlin, vice-governor of Hainan province.
Ji Wenlin has became the latest high-profile official to be probed on suspicion of violations of discipline amid anti-graft efforts.
Ji Jianye, former mayor of Nanjing, capital of east China's Jiangsu Province, is being investigated by prosecutors, according to the Supreme People's Procuratorate.
Tong Mingqian, a senior political advisor in Central China's Hunan province, has been removed from his post for serious discipline and law violations in a major electoral fraud.
The Communist Party of China has taken unprecedented measures to root out corruption since new leadership was elected in November 2012.
At least seven ministerial-level officials have been investigated by the top anti-corruption watchdog since last November.
The Communist Party of China's discipline watchdog hands over eight senior officials to court with 23 others still under investigation.