Shanxi Governor Li Xiaopeng has pledged to fight corruption in the coal-rich province after more senior officials came under investigation by the Communist Party's anti-graft body last week.
Provincial party committee members showed their support for Li - seen as a "princeling" as the son of former premier Li Peng - at a meeting on Friday following the launch of investigations into Ling Zhengce, a senior provincial political adviser, and Du Shanxue, a deputy Shanxi governor, the Shanxi Daily reported.
Li, the former chairman of electricity giant Huaneng Power who was named the province's governor in December 2012, told party members to resist temptation, exercise discipline and ensure their families and associates did so too.
The party's top anti-graft body, the Central Commission for Discipline Inspection (CCDI) announced on Thursday it was investigating Ling Zhengce, an older brother of Ling Jihua , a long-time aide to former president Hu Jintao .
Wang Maoshe, party secretary of Yuncheng, was also arrested on Thursday for serious breaches of party discipline, the China Business Journal reported on its website, citing Shanxi organisation department secretary Tang Tao.
The latest arrests underscore the widening crackdown on corrupt officials in Shanxi and suggests investigators could be closing in on Ling Jihua himself. The younger Ling was accused of covering up his son's death in the crash of a Ferrari in March 2012.
Tang told Yuncheng party committee members at a meeting on Friday that Wang was under official investigation, and that Wang Qingxian the mayor of Yuncheng, would take over Wang's position, the Journal reported. The arrest might be related to his dealings with state-owned food producers, it said.
The report said Wang was on friendly terms with Ling Zhengce and Du.
Officials arrested Wang without warning. He was meant to meet a guest on Thursday at 5pm but did not show up. He was taken away about an hour later. The anti-graft body announced the investigation into Ling Zhengce at 5.30pm that day.