Ranking Chinese leader replaced amid reports of probe

In this March 13, 2017 photo, the then-party secretary of Chongqing, Sun Zhengcai, attends a plenary session of China's National People's Congress (NP

In this March 5, 2017 photo, Chen Min-er, center, the then-party secretary of Guizhou, attends the opening session of China's National People's Congre

BEIJING (AP) — A Chinese politician considered a potential future leader has been replaced as head of the central mega-city of Chongqing amid reports he is facing a graft investigation.

The move is a possible sign of a shakeup in roles ahead of a crucial Communist Party congress later this year.

The South China Morning Post said Monday that Sun Zhengcai is being investigated by the ruling Communist Party's anti-graft arm.

The Chongqing government said on its website Saturday that Sun Zhengcai was being replaced as head of the city's Communist Party committee by Chen Min-er.

Both Sun and Chen sit on the party's 25-member Politburo and are considered candidates for promotion to the body's Standing Committee, the apex of political power in China.

The Chongqing announcement gave no details on the move.