XI'AN - Three police officers in Northwest China were suspended after it was confirmed that a former deputy bank chief under their jurisdiction used multiple fake hukou to buy property.

The three officers, including the deputy head of the public security bureau of Shenmu County, Shaanxi province, have been ordered to cooperate with investigators, said an official with the county committee of the Communist Party of China.

Their punishments will be determined by further investigations, said the official.

Initial investigations found that the two fake hukou, created in Shaanxi's neighboring Shanxi province and transferred to the county, were revoked in January 2012 and on January 19, 2013.

The hukou is a Chinese permanent residence registration and personal identification system governed by public security departments. Gong Aiai, former deputy head of a bank in Shenmu, was found to have at least three hukou, including one legitimate hukou.

Earlier this month, online whistleblowers revealed that Gong accumulated over 20 properties worth an estimated 1 billion yuan ($159 million) in Beijing using her fake IDs.

Following the online exposure, Gong explained that she quit her job with the Shenmu County Commercial Bank and started helping her family with their family businesses, which include mining. The houses were purchased with her legal income, and she did not use her position at the bank to acquire them, she said.

Yu Qingcai, chairman of the bank, said Gong tendered her resignation letter last year and has not contacted the bank since. The bank approved her resignation request early this month.