The former head of China's powerful internet regulator is under investigation for suspected corruption, the ruling Communist Party said, the latest senior official to be caught up in a sweeping campaign against graft.

Lu Wei was suspected of serious disciplinary violations, the party's corruption-busting Central Commission for Discipline Inspection (CCDI) said in a brief statement late on Tuesday, using a euphemism for graft.

Reuters was unable to reach Lu or a representative to seek comment.