Former Railways Minister Liu Zhijun is still under investigation, said a senior official with the discipline watchdog of the Communist Party of China (CPC) on Wednesday.

Wu Yuliang, deputy secretary of the Central Commission for Discipline Inspection (CCDI) of the CPC, made the remarks at a press conference on the CPC's efforts to fight corruption.

The CPC discipline watchdog said in February that Liu was being investigated for alleged "severe violation of discipline," and the national legislature dismissed him from his post of railways minister later that month.

Liu became the railways minister in March 2003.

"From Liu's case we can see that the Party and government's firm determination to fight corruption, and the Party is carrying out more strict supervision on officials, especially the heads of all government departments," Wu said.

The official promised that further information will be publicized when the investigation of Liu's case is completed.

According to Wu, the CPC will strengthen supervision on heads of government departments in accordance with the intra-Party supervision regulation, by sending inspection teams and instationing discipline officials in government departments.