Ukraine’s energy and justice ministers offered their resignations on Wednesday, shortly after President Volodymyr Zelensky said both should go over their alleged involvement in a sweeping corruption scandal in the country’s energy sector.

Investigators earlier alleged a key Zelensky ally orchestrated a US$100 million kickback scheme to siphon funds, triggering public anger at a time of widespread power outages caused by Russian attacks.

Ukraine has long been plagued by corruption and cracking down on graft is seen as a key requirement of its bid to join the European Union.

Zelensky said his Justice Minister German Galushchenko, whom investigators allege was involved in the scheme and received “personal benefits”, as well as Energy Minister Svitlana Grynchuk, should tender their resignations.

Neither is known to have been charged and Grynchuk has not been mentioned as having profited from the scheme.

“The minister of justice and the minister of energy cannot remain in their positions,” Zelensky said in a video posted on social media.