▲ This photo, taken on Oct. 10, 2025, shows South Korea's First Vice Foreign Minister Park Yoon-joo (R) shaking hands with Under Secretary of State for Political Affairs Allison Hooker before their talks at the foreign ministry in Seoul. (Pool photo) (Yonhap)

(LEAD) S Korea-US talks

(LEAD) Senior U.S. diplomat to visit Seoul in coming weeks to launch working groups on Oct. summit agreements: State Dept.

(ATTN: RECASTS para 3; ADDS more info in paras 5-7)

By Song Sang-ho

WASHINGTON, May 19 (Yonhap) -- A senior U.S. diplomat will visit Seoul in the coming weeks to launch bilateral working groups to implement agreements from a summit between South Korean President Lee Jae Myung and U.S. President Donald Trump in October, the State Department said Tuesday.

Under Secretary of State for Political Affairs Allison Hooker will lead a U.S. delegation to the South Korean capital, the department said, after she and Seoul's First Vice Foreign Minister Park Yoon-joo held talks in Washington.

Park arrived in the U.S. capital on Monday apparently as part of efforts to accelerate progress in the implementation of the summit agreements, including U.S. cooperation on Seoul's push to build nuclear-powered submarines and secure rights to civil uranium enrichment and spent nuclear fuel reprocessing.

"Under Secretary Hooker will lead an interagency delegation to Seoul in the coming weeks to launch bilateral working groups to continue implementing understandings from President Trump's October 2025 visit to the ROK," the department said in a media note. ROK is short for South Korea's official name, the Republic of Korea.

The department did not elaborate on the understandings, but it apparently referred to those specified in a joint fact sheet released to outline bilateral summit agreements on security, trade, investment and other bilateral issues.

In the fact sheet, the U.S. codified its approval for South Korea to build nuclear-powered, conventionally armed attack submarines, and its support for a process that will "lead to the ROK's civilian uranium enrichment and spent fuel reprocessing for peaceful uses."

Park's visit to Washington this week came amid concerns over the seemingly slow implementation of those agreements.

During their talks, Park and Hooker discussed efforts to advance the "broad and enduring" alliance between the two countries, including in security and economic cooperation, it said.

Both sides reaffirmed the importance of ensuring the freedom of navigation through the Strait of Hormuz and in global waterways, according to the department.

The U.S. side reaffirmed its commitment to the defense of South Korea, including through its "extended deterrence" commitments. Extended deterrence means the U.S.' commitment to using the full range of its military capabilities, including nuclear arms, to defend its Asian ally.

At the talks, Hooker emphasized that the U.S. expects continued progress in the bilateral trade and industrial partnership, and underscored the need to ensure "fair" treatment of U.S. companies and the prompt resolution of market access barriers.

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