Biden, Ukraine's Poroshenko agree Russia sanctions must be tied to Minsk

WASHINGTON (Reuters) - U.S. Vice President Joe Biden and Ukrainian President Petro Poroshenko agreed in a telephone call on Wednesday that sanctions against Russia must be tied to the full implementation of the Minsk peace plan, the White House said.

"As long as Russia continues to fuel violence and instability in Ukraine, the international community must be prepared to increase the costs to Russia for pursuing such actions," it said in a statement.