Zhang Huawei, a former division head for the top anti-corruption watchdog, is himself being investigated for suspected corruption.

The Communist Party of China Central Commission for Discipline Inspection issued a statement on its website on Monday saying that Zhang - who was a senior official at the level of vice-minister - "had seriously violated the Party's code of conduct".

According to Capitalnews, the WeChat account of Beijing Daily, Zhang is the only head of a national inspection team to be investigated.