Kang and Pompeo will meet face-to-face for the first time since the collapse of the second summit between US President Donald Trump and North Korean leader Kim Jong-un in Hanoi on Feb. 27 and 28.

The highly anticipated summit fell apart as the two sides failed to bridge their differences on Pyongyang's denuclearization and Washington's sanctions relief.

Since then, concerns have persisted that the US and the North could drift toward another deadlock in their nuclear negotiations.

Seoul has been seeking ways to facilitate the resumption of Washington-Pyongyang talks.

During their talks, Kang and Pompeo are expected to exchange views on Pyongyang's movements following the Hanoi summit.

North Korea's Vice Foreign Minister Choe Son-hui has threatened to abandon the nuclear talks, voicing frustration over US demands for sweeping denuclearization steps.

Last Friday, the North abruptly pulled out its staff from an inter-Korean liaison office in its border city of Kaesong. Three days later, it returned some personnel to the office after US President Donald Trump tweeted that he had ordered the withdrawal of new sanctions against the North.

The minister and secretary are also expected to discuss ways to reaffirm bilateral cooperation over the North's denuclearization amid rumors of a possible rift between the allies.

The rumors emerged as Seoul sought to push for inter-Korean economic cooperation, while Washington appeared intent on tightening the sanctions regime against Pyongyang. (Yonhap)