Wang Tianpu, president of the State-owned Sinopec Group, Asia's biggest crude oil refiner, is under investigation for suspected "serious disciplinary violations", the anti-graft watchdog said on Monday.

The China Central Commission for Discipline Inspection posted the statement on its website in the late afternoon, without giving further details.

The board of the company published a short statement on Monday evening, saying that the company supports the decision of the central government and will continue to fight against corruption.