Blinken visited just as investigators were trying to arrest conservative President Yoon Suk Yeol, who has entrenched himself in his residence after being impeached for a failed attempt to impose martial law.
North Korea on Monday fired a ballistic missile into the sea just as Blinken was holding meetings in Seoul, according to the South Korean military.
“Our military detected one projectile presumed to be an intermediate-range ballistic missile” launched toward the East Sea, South Korea’s military said, referring to the body of water also known as the Sea of Japan.
After the missile flew around 1,100 kilometers (680 miles), the military said Seoul “strengthened surveillance and vigilance” for any more launches.
The missile appeared to have fallen into the water, according to Japan.
Seoul was “in close coordination with the US and Japan” about the launch, the South’s military added.
The test comes two weeks before the inauguration of President-elect Donald Trump, who in his last term sought to woo North Korea with a unique personal diplomacy.
Blink en’s final tour
Blinken, on the first stop of what will likely be his final trip as the top US diplomat, met acting president Choi Sang-mok, a technocrat in office just over a week, as well as Foreign Minister Cho Tae-yul, who is not under threat of impeachment.
With noisy protests gripping Seoul and audible from Blinken’s hotel, he steered clear of wading into partisan politics.
Blinken reiterated the “ironclad commitment” of Washington to defending South Korea and spoke with Choi about “how both sides will work together to further strengthen bilateral cooperation and trilateral cooperation with Japan”, a State Department statement said.
Until briefly imposing martial law on December 3, Yoon had been a darling of President Joe Biden’s administration for his pro-US policies on the global stage.
Yoon delighted the United States by seeking to turn the page on decades of friction with Japan, a fellow US ally that is also home to thousands of US troops.
Yoon joined Biden and Japan’s then-prime minister Fumio Kishida in 2023 for a landmark three-way summit at the Camp David presidential retreat that included a promise to step up intelligence cooperation with North Korea.
Choi’s office said in a statement that South Korea remained committed to the “principles and agreements from the Camp David summit”.
The acting president “stated that South Korea will continue to maintain its diplomatic and security policies based on a strong Korea-US alliance and trilateral cooperation among South Korea, the US, and Japan”, the statement said.
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