Ukrainian President Volodymyr Zelensky announced on Friday that his chief of staff, Andriy Yermak, has resigned following his implication in an ongoing scandal involving one of the nation’s largest energy companies.

The news of Yermak’s resignation comes shortly after the Ukrainian Anti-Corruption Bureau confirmed that it conducted searches of his home following implication in a long-running corruption case involving several high-profile officials and the state nuclear power monopoly, Energoatom.