North Korea on Saturday slammed U.S. House Speaker Nancy Pelosi over her recent visit to the heavily fortified Demilitarized Zone, calling her the “worst destroyer of international peace.”

Axar.az reports citing foreign media that Pelosi, who visited Seoul earlier this week following a trip to Taiwan, became the highest-ranking U.S. official to visit the Joint Security Area between the two Koreas since then-President Donald Trump met North Korean leader Kim Jong Un there in 2019.

Prior to the JSA visit, Pelosi discussed the “grave situation” and growing threat posed by the North’s nuclear weapons program with her South Korean counterpart, National Assembly Speaker Kim Jin-Pyo.