Replicas of a North Korean and South Korean missiles are displayed at the Korean War Memorial in Seoul on March 6, 2017.
Jung Yeon-Je—AFP/Getty Images
March 6, 2017 8:54 PM EST

(SEOUL) – U.S. President Donald Trump discussed plans to respond to North Korea’s recent missile launches with South Korea’s acting president Hwang Kyo-ahn, an official at Hwang’s office said.

Trump also had a phone call with Japanese Prime Minister Shinzo Abe on Tuesday, reaffirming its alliance with Tokyo and condemning North Korea’s tests as a threat to regional security.

North Korea fired four ballistic missiles into the sea off Japan’s northwest on Monday, angering South Korea and Japan.

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