The White House said it did not support Ukraine launching attacks inside Russia after two drones from Ukraine damaged buildings in Moscow earlier on Monday.
"As a general matter we do not support attacks inside of Russia," White House spokesperson Karine Jean-Pierre told reporters in a press briefing.
Russia vowed to take harsh retaliatory measures against Ukraine, calling the two drone strikes, including one close to the Defense Ministry's headquarters, a brazen act of terror.
"This is a war that Russia started. This is their war," Jean-Pierre said. "And they can end it at any time by withdrawing forces from Ukraine instead of launching brutal attacks on civilians."
Nobody was hurt in the attack in Moscow -- the most high-profile of its kind since two drones reached the Kremlin in May.
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