North Korea leader Kim Jong-un has called for an end to confrontation between the two Koreas, in a surprise New Year speech broadcast on state media.

The Koreas are technically still at war in the absence of a peace treaty to end their 1950-53 conflict.

The address by Mr Kim appeared to take the place of the policy-setting New Year editorial published in leading state newspapers.

However, North Korea has offered olive branches before and Mr Kim's speech does not necessarily signify a change in tack from a country that vilifies the United States and US ally South Korea.

Impoverished North Korea raised tensions in the region by launching a long-range rocket in December that it said was aimed at putting a scientific satellite in orbit, drawing international condemnation.

North Korea is banned from testing missile or nuclear technology under UN sanctions imposed after its 2006 and 2009 nuclear weapons tests.

"An important issue in putting an end to the division of the country and achieving its reunification is to remove confrontation between the north and the south," Mr Kim said in the address that appeared to be pre-recorded and was made at an undisclosed location.

"The past records of inter-Korean relations show that confrontation between fellow countrymen leads to nothing but war."

Mr Kim took over power in the reclusive state after his father, Kim Jong-il, died in 2011.

The New Year address was the first in 19 years by a North Korean leader after the death of Kim Il-sung, Kim Jong-un's grandfather.

Kim Jong-il rarely spoke in public and disclosed his national policy agenda in editorials in state newspapers.

The two Koreas have seen tensions rise to the highest level in decades after the North bombed a Southern island in 2010 killing two civilians and two soldiers.

The sinking of a South Korean navy ship earlier that year was blamed on the North, but Pyongyang has denied it and accused Seoul of waging a smear campaign against its leadership.

Last month, South Korea elected as president Park Geun-hye, a conservative daughter of assassinated military ruler Park Chung-hee.

Ms Park has vowed to pursue engagement with the North and called for dialogue to build confidence, but she has demanded that Pyongyang abandon its nuclear weapons ambitions, something it is unlikely to do.

Absent from Mr Kim's speech was any mention of the nuclear arms programme.