Antoni Macierewicz made the assertion during a parliamentary debate on Thursday. He later told reporters he had the information "from good sources," but did not reveal any other details.
On Friday, Macierewicz added that "if Egypt would now withdraw from this operation, it would be a gain for world peace" and a good lesson for Russia.
France had originally built the two ships for Russia, but the sale was canceled after Russia's annexation of Ukraine's Crimean Peninsula. France refunded the 950 million euros ($1 billion) already paid by Russia and sold the ships to Egypt.
Macierewicz's comment comes amid strained ties between Warsaw and Paris due to Poland's cancellation of a $3.5 billion deal to buy French-made military helicopters.
In Moscow, President Vladimir Putin's spokesman, Dmitry Peskov, rejected Macierewicz's claim as "complete nonsense."
Russian Defense Ministry spokesman Maj. Gen. Igor Konashenkov also dismissed Macierewicz's statements as "silliness" and "self-promotion."