SEOUL - The Republic of Korea's President Moon Jae-in offered Monday to the Democratic People's Republic of Korea finding a breakthrough together through dialogue, according to the presidential Blue House.

"I know well about Chairman Kim Jong-un's determination and efforts to change the Korean Peninsula situations in an epoch-making way. I also feel very sorry that progress hasn't been made in the DPRK-US and the inter-Korean relations as expected," Moon told a meeting with his senior aides.

"It is high time that the South and the North go to find a breakthrough together. The time has come that (the two Koreas) would no longer sit and wait for improved conditions," said Moon.

Moon said he wished to actively find and put into practice the projects that the two Koreas can choose and push for on their own, vowing to continue efforts to gain consent from the international community.

He expressed his anticipation that the DPRK would open its door for dialogue and put ideas together.

Moon's comment came after Kim Yo-jong, first vice department director of the Central Committee of the Workers' Party of Korea (WPK) and younger sister of top DPRK leader Kim Jong-un, said in a statement Saturday night that she had given instructions for decisive action to be taken.

"If I drop a hint of our next plan the ROK authorities are anxious about, the right to taking the next action against the enemy will be entrusted to the General Staff of our army," She said, adding that the army "will determine something for cooling down our people's resentment and surely carry it out."

The DPRK has repeatedly lashed out at ROK since last week in protest against anti-Pyongyang propaganda leaflets sent by defectors and activists across the border. Pyongyang has also closed its joint liaison office and cut off all communication lines with the South.