North Korea has responded to a recent visit to Seoul by the U.S. president with harsh invective, including more personal attacks on South Korea’s leader.

The North’s Committee for the Peaceful Reunification of the Fatherland on Sunday labeled South Korean President Park Geun-hye “a dirty prostitute” and the United States’ “comfort woman” following Park’s public appearances with U.S. President Barack Obama this weekend.

“Comfort women” refers to women in Korea – and other territories occupied by the Empire of Japan prior to the end of World War II – who were forced into sexual slavery for the Japanese army.

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