President Moon Jae-in said Monday he will pursue "in earnest" another summit with Kim Jong Un despite the North Korean leader's recent criticism of Seoul's self-proclaimed role as a mediator in stalled nuclear talks.

Moon has been eager to regain momentum in talks with North Korea since Kim's second summit with U.S. President Donald Trump, in Vietnam in February, failed due to conflicting demands by Pyongyang for sanctions relief and by Washington for sweeping North Korean measures to abandon its nuclear program.

Kim said in a speech Friday that he is willing to hold another summit with Trump if the United States changes its calculation and offers a "proper attitude and a methodology," setting a year-end deadline.