China watchdog probes Politburo member

Beijing : The Chinese Communist Party's anti-graft watchdog has launched an investigation into a Politburo member once seen as a contender for a top leadership post, just months before a major political congress.

The Central Commission for Discipline Inspection is investigating Sun Zhengcai, who some 10 days ago was ousted as party chief in the major city of Chongqing, for "serious discipline violation", the official Xinhua news agency said.

Sun is the first serving member of the 25-person Politburo to be placed under investigation since Bo Xilai, also a former Chongqing party chief who was jailed for life in 2013 in the wake of President Xi Jinping's anti-corruption campaign.

Xinhua's brief report did not expand on the accusations nor say whether Sun would remain a member of the Politburo. His replacement as party chief in Chongqing was announced on July 15.

Analysts say the shake-up in Chongqing will have implications for the Communist Party's 19th congress later this year, which will likely cement Xi's position as the most powerful Chinese leader for a generation.

At the gathering, Xi is widely expected to secure a second five-year term.

But all eyes will be on who will depart or ascend to the Politburo's standing committee, the elite group of seven politicians who run the world's second largest economy.

Sun, who was replaced in the city by former Xi aide Chen Miner, had once been tipped for promotion to the standing committee. At 53, he is the youngest member of the Politburo.