The latest subjects of China's anti-graft campaign are Ji Wenlin, former deputy governor of Hainan; Yu Gang, a former senior official in the Politics and Legal Affairs Commission; and Tan Hong, a former senior officer in the Ministry of Public Security.
Ji and Yu were also expelled for violating Party regulations by engaging in adultery.
The three were former aides to former chief of domestic security, Zhou Yongkang, who retired in 2012. Once among the most powerful men in China, he retired the same year that President Xi Jinping announced efforts to reform the party's elite. The latest expulsions suggest Zhou may himself soon face charges.