Russian Prime Minister Dmitry Medvedev warned Friday that he is prepared to wage “economic war” with America if the Trump administration tries to impose tougher sanctions against his country.

“I would like not to comment on the talks about future sanctions, but there is one thing I can say: if measures like a ban on banking activities or the use of this or that currency follows, this can be clearly be described as a declaration of an economic war,” Medvedev said, according to the state-run Tass.