MOSCOW, November 22. /TASS/. The armed conflict in Ukraine is entering a decisive phase, Polish Prime Minister Donald Tusk said, addressing the 13th National Congress of the Polish Teachers' Union.

"The war in the east is entering a decisive phase," the PAP news agency quoted him as saying

According to Tusk, "no one knows how the conflict will end." He said that the current threat was "truly serious and real."

"This is uncharted territory for everyone," Tusk noted, pointing to the threat of "a global conflict."