U.S. Vice President Joe Biden left Washington Wednesday for a five-day trip that will include talks with leaders in Ukraine later this week.
A senior White house official said Biden on Friday will convey U.S. concerns about "Russia’s ongoing violations of the September 5 Minsk agreement with Ukraine."
The agreement called for a cease-fire between Kyiv and pro-Russian separatists.
The White House said Russia has not taken meaningful steps to implement its obligations under the agreement, such as removing all of its troops from Ukraine and stopping the flow of mercenaries, weapons and equipment across the border.
The U.S. said Moscow has also failed to allow an international observer mission to monitor the international border between Russia and Ukraine.
While in Ukraine, Biden will chair a roundtable discussion on anti-corruption and rule of law reforms.
Biden's trip will also include stops in Morocco and Turkey.