President Donald Trump hinted at a possible meeting with North Korean leader Kim Jong Un at the Demilitarized Zone between North and South Korea following his G20 summit trip with world leaders.

"If Chairman Kim of North Korea sees this, I would meet him at the Border/DMZ just to shake his hand and say Hello(?)!" Trump tweeted.

North Korea responded to Trump's tweet and described it as "very interesting," adding that the country has "not received an official proposal in this regard."

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President Donald Trump hinted at a possible meeting with North Korean leader Kim Jong Un at the Demilitarized Zone between North and South Korea following his G20 summit trip with world leaders in Japan.

"After some very important meetings, including my meeting with President Xi of China, I will be leaving Japan for South Korea (with President Moon)," Trump said in a tweet. "While there, if Chairman Kim of North Korea sees this, I would meet him at the Border/DMZ just to shake his hand and say Hello(?)!"

During a working lunch with Saudi Arabia Crown Prince Mohammad bin Salman, Trump elaborated on his decision and told reporters he would be visiting the DMZ for around "two minutes."

"I just put out a feeler because I don't know where he is right now," Trump said to reporters at the Imperial Hotel Osaka in Japan. "He may not be in North Korea."

"Frankly, if I didn't become president you'd be right now in a war right now with North Korea," he added. "And by the way, that's a certainty. That's not like, 'maybe.'"

Trump is scheduled to meet South Korean President Moon Jae-in in Seoul on Sunday. A South Korean government official previously suggested that Trump could be meeting the Kim during his visit, but noted there were no plans for a trilateral summit that includes Moon, according to CNN.

Read more: International summits like G20 always seem to bring out the worst in Trump

The US president was scheduled to take a helicopter to the border to meet Kim in 2017, but the meeting was canceled due to inclement weather conditions. The potential trip follows the US-North Korea summit at Hanoi, Vietnam in February, which ended abruptly following disagreements with Pyongyang's path towards denuclearization.

North Korea's First Vice Foreign Minister Choe Son-hui responded to Trump's tweet and described it as "very interesting," adding that the country has "not received an official proposal in this regard," according to a Yonhap News report citing North Korea's state-run Korean Central News Agency.

If Trump decides to make the trip to the DMZ, he would be the fifth US president to visit the border after the Korean Armistice Agreement in the 1950s. Former President Barack Obama last visited the border in 2012.