Washington (CNN) North Korean leader Kim Jong Un received a "personal letter" from US President Donald Trump, according to North Korean state news agency KCNA.

KCNA reported that Kim "said with satisfaction that the letter is of excellent content," after reading it.

"Kim Jong Un said that he would seriously contemplate the serious content" and appreciated the "extraordinary courage of President Trump," KCNA added.

White House press secretary Sarah Sanders confirmed a letter was exchanged, saying, "A letter was sent by President Trump and correspondence between the two leaders has been ongoing."

South Korea's Office of the President "evaluates the exchanges of personal letters between the leaders of the United States and North Korea positively from the perspective of continuing the momentum of the US-North Korea talks," according to a statement it released Saturday.

Read More