WASHINGTON -- US President Donald Trump reaffirmed his commitment to achieving North Korea's denuclearization in a letter to South Korea's new ambassador to Washington, the South Korean Embassy here said Tuesday.

Trump wrote a note Monday in response to Amb. Lee Soo-hyuck's letter accompanying his credentials, the embassy said in a press release. Lee presented his credentials to the US president the same day.

"President Trump said Amb. Lee's appointment demonstrates the resilience of the South Korea-US alliance and takes on significance in various ways," the embassy said.

Trump hailed the alliance as a "linchpin" of regional peace and security, it said, and noted the development of the bilateral relationship into a global partnership.

"Moreover, he reaffirmed the commitment of South Korea and the US to achieve the joint goal of North Korea's final, fully verified denuclearization, and expressed hope that South Korea-US economic cooperation relations will deepen with the implementation of the 2019 revised free trade agreement," the embassy said.

Lee took over as ambassador in October.

He asked Trump during the credentialing ceremony to continue to show leadership on the North Korean nuclear issue and the president said in response that he would do so, the embassy said in an earlier press release. (Yonhap)