SINGAPORE — South Korean President Moon Jae-in says his country could help North Korean and U.S. efforts to find the remains of U.S. military personnel missing in action and presumed dead from the 1950-53 Korean War.

Moon’s office says he made the proposal to President Donald Trump as they spoke over the phone after Trump’s summit with North Korean leader Kim Jong Un in Singapore.

Moon’s office says he told Trump the summit was a success that laid down a “big framework” for peace in the Korean Peninsula and the world.

Moon’s office says Trump told Moon he was impressed by Kim’s determination reflected by a decision to destroy a missile test site.

READ MORE: 8 early takeaways from the Trump-Kim summit