Wu Ding, CEO of China Resources Capital Holdings Co, has been under investigation since a few days ago, financial news portal caixin.com reported Thursday.

The news of Wu being detained came after Song Lin, CEO of the parent company China Resources (Holdings) Co, was placed under investigation earlier this month.

Wu, 49, has "a close relationship" with Song, who has not been charged or convicted of any crimes yet, caixin.com said.

Information about Wu was removed from China Resources Capital's website, and a company staff member said she did not know who the current CEO was.