US President Donald Trump has announced the date and location of his historic meeting with North Korean leader Kim Jong-un, calling it a "very special moment for World Peace!", wrote Independent.

Mr Trump said in a tweet that he and Mr Kim will meet June 12. The location of the meeting, Singapore, had previously been disclosed.

"The highly anticipated meeting between Kim Jong Un and myself will take place in Singapore on June 12th," Mr Trump wrote. "We will both try to make it a very special moment for World Peace!"

The announcement followed just hours after Mr Trump welcomed three Korean-Americans who were detained in North Korea for more than a year back into the United States.

Those three former prisoners were welcomed back to the United States at Joint Base Andrews in Maryland, where Mr Trump and first lady Melania Trump boarded a medical plane they were on to have a private word before presenting them to the media outside.

"We would like to express our deep appreciation to the United States government, President Trump, Secretary of State Mike Pompeo, and the people of the United States for bringing us home," a statement from the men that was sent out shortly after the plane carrying them home landed on US soil, read.

Mr Trump's meeting with Mr Kim would be the first time that a siting American president has met with the leader of North Korea.

The president has vowed to walk away from the table if he thinks that Mr Kim is negotiating in bad faith. In recent weeks, Mr Trump has cited Mr Kim's willingness to negotiate as a sign that his tough approach towards North Korea earlier in his presidency — which he has referred to as a "maximum pressure" campaign — has worked.

The coming negotiations, which Mr Trump hopes will result in an end to North Korea's nuclear weapons ambitions, have led to some claims that he should receive the Nobel Peace Prize.

"Everyone thinks so, but I would never say it," Mr Trump said of the prospect Wednesday when asked about the chatter.