WUHAN, April 1 -- Four more officials are under investigation in central China's Hubei Province for discipline violations, local authorities said on Tuesday.

Liu Muzhen, chairman of E'zhou City Committee of the Chinese People's Political Consultative Conference, was removed from his post for a "serious violation of discipline", according to the website of the local Communist Party discipline watchdog.

The website also confirmed three other officials were under investigation, including Yu Xinguo, director of the economic and information commission of Wuhan City, Wang Hongqiang, deputy director of the standing committee of the People's Congress of Yichang City, and Zhang Qinyun, member of the party committee and general manager of Hubei Daily Media Group.

One day ago, a provincial official was sacked and another from Huanggang City in Hubei put under investigation.