Ukrainian President Volodymyr Zelenskiy has called for the dismissal of two cabinet ministers amid a probe into an alleged corruption scheme involving a former associate that has fuelled public anger at the wartime government.

Anti-corruption authorities said this week they had detained five people and identified two others still at large, suspected of involvement in an alleged $US100 million ($A153 million) plot to control procurement at nuclear agency Energoatom and other state enterprises.

Ukraine's biggest wartime graft scandal comes as the country's outmanned and under-equipped troops are struggling to fend off grinding Russian advances on the battlefield.

Zelenskiy, whose former business associate from his comedy career is among the suspects, said in a video address that corruptio

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