South Korean President Moon Jae-in and North Korean leader Kim Jong Un, right, wave during a welcoming ceremony at Sunan International Airport in Pyongyang in North Korea. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in and North Korean leader Kim Jong Un, right, wave during a welcoming ceremony at Sunan International Airport in Pyongyang in North Korea. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, front right, his wife Kim Jung-sook, North Korean leader Kim Jong Un, front left, and his wife Ri Sol Ju, left, inspect honour guard during a welcoming ceremony at Sunan International Airport in Pyongyang, North Korea. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, front right, his wife Kim Jung-sook, North Korean leader Kim Jong Un, front left, and his wife Ri Sol Ju, left, inspect honour guard during a welcoming ceremony at Sunan International Airport in Pyongyang, North Korea. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, left, waves while walking with North Korean leader Kim Jong Un during a welcome ceremony at Sunan International Airport in Pyongyang, North Korea, Tuesday, Sept. 18, 2018. (Pyongyang Press Corps Pool via AP)
South Korean President Moon Jae-in, left, waves while walking with North Korean leader Kim Jong Un during a welcome ceremony at Sunan International Airport in Pyongyang, North Korea, Tuesday, Sept. 18, 2018. (Pyongyang Press Corps Pool via AP)
South Korean President Moon Jae-in and his wife Kim Jung-sook wave during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in and his wife Kim Jung-sook wave during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, front right, his wife Kim Jung-sook, second from right, North Korean leader Kim Jong Un, front left, and his wife Ri Sol Ju inspect an honour guard during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, front right, his wife Kim Jung-sook, second from right, North Korean leader Kim Jong Un, front left, and his wife Ri Sol Ju inspect an honour guard during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, second from right, is greeted by North Koreans as North Korean leader Kim Jong Un, right, watches during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, second from right, is greeted by North Koreans as North Korean leader Kim Jong Un, right, watches during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, right, is greeted by North Koreans during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, right, is greeted by North Koreans during a welcome ceremony at Sunan International Airport in Pyongyang. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, second from right, and his wife Kim Jung-sook, second from left, are welcomed by North Korean leader Kim Jong Un and his wife Ri Sol Ju upon their arrival at Sunan International Airport. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, second from right, and his wife Kim Jung-sook, second from left, are welcomed by North Korean leader Kim Jong Un and his wife Ri Sol Ju upon their arrival at Sunan International Airport. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, right, is escorted by North Korean leader Kim Jong Un during a welcoming ceremony in Pyongyang in North Korea. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, right, is escorted by North Korean leader Kim Jong Un during a welcoming ceremony in Pyongyang in North Korea. Picture: Pyongyang Press Corps Pool via AP
South Korean President Moon Jae-in, left, stands with North Korean leader Kim Jong Un during a welcoming ceremony at Sunan International Airport in Pyongyang in North Korea, Tuesday, Sept. 18, 2018. (Pyongyang Press Corps Pool via AP)
South Korean President Moon Jae-in, left, stands with North Korean leader Kim Jong Un during a welcoming ceremony at Sunan International Airport in Pyongyang in North Korea, Tuesday, Sept. 18, 2018. (Pyongyang Press Corps Pool via AP)
In this image made from video provided by Korea Broadcasting System (KBS), South Korean President Moon Jae-in, left, poses with North Korean leader Kim Jong Un for a photo on the podium upon arrival in Pyongyang. Picture: Korea Broadcasting System via AP
In this image made from video provided by Korea Broadcasting System (KBS), South Korean President Moon Jae-in, left, poses with North Korean leader Kim Jong Un for a photo on the podium upon arrival in Pyongyang. Picture: Korea Broadcasting System via AP
South Korean President Moon Jae-in, second from right, and his wife Kim Jung-sook, left, are welcomed by North Korean leader Kim Jong Un and his wife Ri Sol Ju upon their arrival in Pyongyang. Picture: Korea Broadcasting System via AP
South Korean President Moon Jae-in, second from right, and his wife Kim Jung-sook, left, are welcomed by North Korean leader Kim Jong Un and his wife Ri Sol Ju upon their arrival in Pyongyang. Picture: Korea Broadcasting System via AP

Pyonyang, North Korea - The leaders of the two Koreas have begun their official summit talks on denuclearization of the Korean Peninsula and other issues.

South Korean President Moon Jae-in flew to Pyongyang on Tuesday for his third summit of the year with North Korean leader Kim Jong Un.

Moon's office says Moon's summit with Kim began later Tuesday at a ruling Workers' Party building in Pyongyang.

It says two top officials each from North and South Korea are also attending the summit meeting along with their leaders.

South Korean President Moon Jae-in, left, hugs North Korean leader Kim Jong Un upon arrival in Pyongyang, North Korea. Moon landed in Pyongyang for his third summit this year with Kim. Picture: Korea Broadcasting System via AP

Moon and Kim are to meet again on Wednesday.

Moon's office has said this week's summit talks will focus on how to achieve denuclearization, lower a military standoff between the Koreas and promote their ties.

AP