The invitation to Pyongyang contained in the letter, which was handed by Kim Jong-un's top aide Kim Yong Chol to the US President Trump on June 1, the Chosun Ilbo newspaper reported, citing its sources privy to the matter.
In turn, North Korean state media reported on Monday that the upcoming US-North Korean talks would focus on the establishment of the new relations between the countries, the creation of a firm peace system and the denuclearization on the Korean peninsula.
Meanwhile, US Secretary of State Mike Pompeo said Monday that Washington remained committed to the denuclearization of the Korean peninsula.
"Early pre-brief with my @StateDept team. [US] Amb[assador to the Philippines Sung] Kim meets with #DPRK [delegation] today. We remain committed to the complete, verifiable, irreversible denuclearization of the Korean Peninsula," Pompeo wrote on Twitter.
The meeting between US President Donald Trump and North Korean leader Kim Jong-un is expected to kick-off at 9 a.m. local time on Tuesday. The historic event is precede by the meeting of delegations of the United States and North Korea on Monday.
The UN Security Council adopted a series of resolutions in an attempt to make North Korea abandon its nuclear aspirations and re-engage in a denuclearization dialogue.
In May, North Korea, in a gesture of goodwill, blew up three test mines at the Punggye-ri nuclear site, as well as destroyed security checkpoints and other facilities.