(CNN) Secretary of State Mike Pompeo has received a letter from Kim Jong Un to US President Donald Trump, according to a State Department official.

The official confirmed what Trump had told reporters earlier Friday, that a letter was handed over at the Korean DMZ on Thursday and is now en route to him.

"A letter is being delivered to me, a personal letter from Kim Jong Un to me. That was handed at the border, I don't know if you know that, but it was handed at the border yesterday," he told the press aboard Air Force One, adding that he believes it will be a "positive" letter.

"It's being delivered. It's actually an elegant way. The way it used to be many years ago before we had all the new contraptions that we all use," Trump said. "But a letter is being delivered to me and I think it's going to be a positive letter."

It is not the first missive between the two leaders. Senior North Korean official Kim Yong Chol hand delivered a letter to Trump at the White House before the two men met in Singapore in September, and several have changed hands since then.

North Korean envoy Kim Yong Chol hands over a letter to Trump, purportedly from Kim.

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