Chinese authorities have seized assets worth at least 90 billion yuan ($14.5 billion) from family members and associates of retired domestic security czar Zhou Yongkang, who is at the center of China's biggest corruption scandal in more than six decades, two sources said.
More than 300 of Zhou's relatives, political allies, proteges and staff have also been taken into custody or questioned in the past four months, the sources, who have been briefed on the investigation, said.
The sheer size of the asset seizures and the scale of the investigations into the people around Zhou — both unreported until now — make the corruption probe unprecedented in modern China and would appear to show that President Xi Jinping is tackling graft at the highest levels.