Two more officials from Shanghai Electric Group have been detained as part of the investigation into the mismanagement of the city's pension fund, the South China Morning Post reported. State media said Tuesday Xu Wei and Cheng Yanmin, who both worked for an asset management company under the group, are being questioned. Shanghai Electric chairman Wang Chengming, executive director Han Guozhang and non-executive director Zhang Rongkun have already been detained. It was confirmed Tuesday that another fund manager from Huaan Fund Management, in which Zhang and Shanghai Electric both have stakes, was also being questioned over his involvement in the scandal. Meanwhile, Hong Kong's Wen Wei Po newspaper said that at least nine top finance industry officials had been called in to "assist" with the investigation.