Ukrainian President Volodymyr Zelensky has vowed to "overhaul" state-owned energy companies, after a major corruption scandal engulfed the country's energy sector, BBC reported.

Around $100 million (£76m) has been embezzled, anti-graft investigators said, causing outrage in a country where Russian attacks have resulted in crippling power outages.

"Alongside a full audit of their financial activities, the management of these companies is to be renewed," Zelensky wrote in a post on X on Saturday, according to BBC.