Kim Yo Jong, the sister of the all powerful North Korean dictator Kim Jong Un, on Saturday issued a fresh threat to South Korea saying that Pyongyang will will take "action" against their neighbours and order its military to take action.

"I feel it is high time to surely break with the south Korean authorities. We will soon take a next action," said Jong in a statement carried by the KCNA news agency.

c's statements came on the back of the simmering tensions between the two Korean nations which have got triggered off due to North Korean activists sending anti-Pyongyang leaflets over the border.

"By exercising my power authorized by the Supreme Leader, our Party and the state, I gave an instruction to the arms of the department in charge of the affairs with enemy to decisively carry out the next action," said Jong, who is a key advisor to North Korean leader Kim.

She added that "the right to taking the next action against the enemy will be entrusted to the General Staff of our army."

Kim's sister, however, refused to divulge the military action which North could take against South but appeared to threaten the destruction of the Joint Liaison Office, in the North Korean border city of Kaesong.

"Before long, a tragic scene of the useless north-south joint liaison office completely collapsed would be seen," her statement on KCNA said.