Biden tells Ukraine's Zelensky US will 'respond decisively' if Russia invades

US President Joe Biden told his Ukrainian counterpart Volodymyr Zelensky in telephone talks on Sunday that Washington and its allies would "respond decisively" if Russia moves to invade its pro-Western neighbor, the White House said.

"President Biden made clear that the United States and its allies and partners will respond decisively if Russia further invades Ukraine," Psaki said in a statement.

Biden also "reaffirmed the United States' commitment to Ukraine's sovereignty and territorial integrity," she said.