Ukrainian President Petro Poroshenko is firing back on two fronts against exiled member of parliament Oleksandr Onyshchenko, who accuses Ukraine’s leader and his inner circle of top allies of massive and methodical corruption.

Poroshenko’s press service has issued a detailed statement condemning Onyshchenko, who fled Ukraine before he was stripped of his parliamentary immunity in July amid accusations he stole $64 million from state-owned gas producer Ukrgazvydobuvannya.