HARBIN - Three officials in Northeast China's Heilongjiang province were put under investigation for serious discipline and law violation, said the provincial discipline inspection watchdog on Monday.

The three were Yang Yanbin, vice mayor of oil-producing Daqing City, Sun Yanbin, former Communist Party chief of Northeast Petroleum University and Fu Yancheng, former head of Fuyuan county government.

China is continuing its unprecedented intensive anti-graft campaign, targeting both high-ranking and minor officials. The effective crackdown has drawn wide applause from the public.