02/13/2015 06:15 pm ET Updated Feb 13, 2015

U.S. Accuses Kremlin Of Joining Ukraine Rebels In Assault Ahead Of Cease-Fire

Sasha Mordovets via Getty Images

The United States accused Russia on Friday of massing artillery and rocket systems around a contested town in eastern Ukraine and joining pro-Russian rebels in attacking Ukrainian forces, calling such actions a violation of the spirit of a cease-fire agreement signed just one day earlier.

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