Seoul's spy service says North Korea is preparing attacks

South Korea's spy agency says North Korean leader Kim Jong Un recently ordered preparations for launching attacks on South Korea, in the latest sign of high tensions on the Korean Peninsula after the North's recent nuclear test and missile launch

SEOUL, South Korea (AP) -- North Korean leader Kim Jong Un recently ordered preparations for launching attacks on South Korea, the South's spy agency disclosed Thursday, as worries about the North grow after its recent nuclear test and rocket launch.

In a closed-door briefing to ruling Saenuri Party members, the National Intelligence Service said Kim's spy agency has begun work to implement his order to "actively muster capabilities" to carry out cyber and other attacks on South Korea, according to one Saenuri official who attended the meeting.

North Korea has a history of attacks on South Korea, such as the 2010 shelling on an island that killed four South Koreans and the 1987 bombing of a South Korean passenger plane that killed all 115 people on board. But it is impossible to independently confirm claims about any such attack preparations.

The Saenuri official refused to say whether the briefing discussed how the information was obtained. The NIS, which has a mixed record on predicting developments in North Korea, said it could not confirm its reported assessment.

During the briefing, the NIS, cited studies on past North Korean provocations and other unspecified assessments and said the attacks could target anti-Pyongyang activists, defectors and government officials in South Korea, the Saenuri official said requesting anonymity because he wasn't authorized to speak to media publicly.

Attacks on subways, shopping malls and other public places could also happen, he said.

The official quoted the NIS as saying North Korea could launch poisoning attacks on the activists and defectors, or lure them to China where they would be kidnapped.

The current North Korea standoff isn't expected to calm down soon, as Seoul and Washington are discussing deploying a sophisticated U.S. missile defense system in South Korea that Pyongyang warns would be a source of regional tension.

The allies also say their upcoming annual springtime military drills will be the largest ever. The North says the drills are preparation to stage a northward invasion.

Seoul defense officials also said that they began preliminary talks on Feb. 7 with the United States on deploying the Terminal High-Altitude Area Defense, the same day North Korea conducted what it said was a satellite launch but is condemned by Seoul and Washington as a banned test of missile technology.

The talks are aimed at working out details for formal missile deployment talks, such as who'll represent each side, according to Seoul's Defense Ministry.

The deployment is opposed by China and Russia too. Opponents say the system could help U.S. radar spot missiles in other countries.

The United States on Wednesday flew four stealth F-22 fighter jets over South Korea and reaffirmed it maintains an "ironclad commitment" to the defense of its Asian ally. Last month, it sent a nuclear-capable B-52 bomber to South Korea following the North's fourth nuclear test.

Foreign analysts say the North's rocket launch and nuclear test put the country further along it its quest for a nuclear-armed missile that could reach the U.S. mainland.