BEIJING, March 12 -- A total of 28 officials at the provincial or ministerial level and higher were placed under judicial investigation for corruption last year, according to a report of China's top procurator.

The officials included Zhou Yongkang, a former member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, and Xu Caihou, former chairman of the Central Military Commission, according to the report distributed Thursday at the annual session of the National People's Congress.