SEOUL -- Lee Jae-myung, presidential candidate of the Republic of Korea's majority liberal Democratic Party, vowed on Monday to restore communication channels with the Democratic People's Republic of Korea.

Lee announced his foreign security policy, saying that he would push for the restoration of inter-Korean communication channels, including military hotlines, mutually stop acts causing tensions, and manage situations in a stable manner.

The presidential frontrunner pledged to promote dialogue, exchange and cooperation with the DPRK while pursuing the Korean Peninsula where the two Koreas can coexist with the de-escalated tensions and denuclearized peace.

The presidential by-election, caused by the removal of former conservative President Yoon Suk-yeol from office over his botched martial law bid, is scheduled for June 3.