DPRK leader Kim Jong-un (left) and US President Donald Trump shake hands after a document signing at the Capella hotel on Sentosa island on June 12, 2018 in Singapore. (EVAN VUCCI / AP)

WASHINGTON - US President Donald Trump said on Friday that he is expecting a "positive" letter from the top leader of the Democratic People's Republic of Korea (DPRK), Kim Jong-un.

READ MORE: Kim, Trump agree on denuclearization at historic summit

"It was handed at the border yesterday," Trump said. "It's actually an elegant way... and I think it's going to be a positive letter."

It was handed at the border yesterday. It's actually an elegant way... and I think it's going to be a positive letter

Donald Trump, US President

Speaking to reporters on Air Force One, Trump said that "I know that a letter is being delivered to me, a personal letter from Kim Jong-un to me." 

"It was handed at the border yesterday," Trump said. "It's actually an elegant way... and I think it's going to be a positive letter."

"The letter is being delivered to me ... I think it's being brought in by Mike Pompeo," he added. 

At the conclusion of the historic Trump-Kim summit in June, the two sides issued a joint statement, in which they agreed to improve bilateral relations and work together to build a lasting and stable peace regime on the peninsula.

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However, the current DPRK-US talks have been stuck in an impasse due to their differences in the scale of denuclearization, US sanctions, and whether to issue a war-ending declaration.

Kim told the Republic of Korea (ROK)'s envoy on Wednesday that he firmly supports and will be devoted to completely removing the danger of armed conflicts and the horrors of war from the Korean Peninsula and turning it into a cradle of peace without nuclear weapons and free from any nuclear threat.

Trump tweeted later on Thursday in response, thanking Kim for making such a statement and noting that "we will get it done together," referring to the denuclearization of the Korean Peninsula.