'Human error, no proof of China’s role’: RK Singh on Mumbai power outage India Published: Tuesday, March 2, 2021, 19:48 [IST] New Delhi, Mar 02: Union Power minister R K Singh said on Tuesday that that the massive grid failure, which hit financial capital Mumbai was "caused by human error and not due to cyber attack". Union Power minister R K Singh "There is no evidence to prove that the October 2020 electricity blackout in Mumbai was caused by a cyberattack perpetrated by China or Pakistan," Singh said. "Some people say that the group behind the attacks is Chinese but we don't have evidence. China will definitely deny it," the minister said.