"Poland's direct participation in the Ukrainian conflict, whether with the defeat of Kiev or before its capitulation, will mean the unleashing of a third world war by NATO," he wrote in Telegram.
Slutsky added that Poland's ambassador to France, Jan Emeryk Rosciszewski, had clearly exceeded his "authority" in trying to push the West toward political suicide.
"It is not surprising that the Polish Embassy hastened to refute the words of the head of the diplomatic mission. Although the ambassador's quote from an interview with a French TV channel has been translated very clearly," the politician said.
Earlier, the Polish ambassador to France, Jan Emerick Rosciszewski, said on the LCI TV channel that if Ukrainian troops could not "defend their independence", then Warsaw would have to enter into a conflict.
Senator of the Federation Council Alexei Pushkov called the statement of the Polish ambassador about readiness for a conflict with Russia arrogant.
At the same time, the Russian senator added that all the "courage" of the Poles "is based on support" from the United States.