We reported earlier that Hungarian Prime Minister Viktor Orban has protested against the EU using frozen Russian assets to fund Ukraine (see post at 7.47am).
His stance has often faced criticism from the bloc, with Polish justice minister Waldemar Zurek the latest to speak out.
He has accused Orban of being closer to Russia than Europe.
"It looks to me today as if Hungary's leadership is closer to the leadership in Moscow than the EU leadership, and I say this with great sadness and also with great concern," Zurek said.
"Orban, unfortunately, wants to blow up the EU from within, and his pro-Russian policies are completely unacceptable to the majority of citizens in the EU."
Orban has accused Poland of making unjust and provocative remarks about Budapest's ties with Moscow
Hungary has been a member of the EU since 2004.