SEOUL - US Secretary of State Mike Pompeo will visit South Korea this week to personally explain the outcome of the Trump-Kim summit to his South Korean counterparts, an official of Seoul's presidential office Cheong Wa Dae was cited by Yonhap news agency as saying on Tuesday (June 12).

The top US diplomat is set to arrive in Seoul on Wednesday, one day after the historic summit between US President Donald Trump and North Korean leader Kim Jong Un in Singapore.

"He is expected to visit Cheong Wa Dae on (June) 14th and explain the outcome of the North Korea-US summit," the Cheong Wa Dae official told reporters on condition of anonymity, Yonhap said.

Following the trip to South Korea, Mr Pompeo is scheduled to fly to Beijing to meet Chinese officials.

The State Department has said Mr Pompeo's stops in South Korea and China demonstrate the Trump administration's "focus on the denuclearisation of the Korean Peninsula and commitment to our alliances and partnerships in the Indo-Pacific Region."

Separately Japanese foreign minister Taro Kono said on Tuesday he will visit Seoul on Wednesday for a possible meeting with Mr Pompeo and South Korean counterpart Kang Kyung Wha , depending on the outcome of the Trump-Kim summit.

The summit, the first of its kind, is widely expected to focus on ridding the North of its nuclear weapons in exchange for a security guarantee that many in South Korea believe could require a formal end to the 1950-53 Korean War.

Seoul and Pyongyang technically remain at war as the Korean War ended only with an armistice.

South Korean President Moon Jae In and Kim have agreed to seek an official end to the war and to replace the Korean armistice with a peace regime.