Ukrainian President Volodymyr Zelenskyy said personnel changes were being carried out at senior and lower levels, a move that follows the most high-profile graft allegations since Russia's invasion nearly a year ago.
Ukraine has a long history of corruption and shaky governance.
On Sunday, anti-corruption police said they had detained the deputy infrastructure minister on suspicion of receiving a $400,000 kickback over the import of generators last September, an allegation the minister denies.