South Korea slams Russian treaty with Pyongyang

• South Korea expresses “grave concern” over Russia’s ratification of its defense treaty with North Korea.
• Ukrainian President Volodymyr Zelenskyy warns of Russia’s plans to send North Korean troops into battle.
• Russian lawmakers unanimously ratify a treaty providing mutual assistance if either party faces aggression.
• South Korea and the US report thousands of North Korean troops are training in Russia.
• South Korea plans to work with allies to address the move.
• North Korea denies sending weapons or soldiers to help Moscow.