World

North Korea denies cyberattack on South Korean companies amid tension on Korean Peninsula

U.S. Secretary of State John Kerry delivers remarks to U.S. Embassy staff at a "Meet & Greet" shortly before leaving Seoul, South Korea, Saturday, April 13, 2013.  U.S. Secretary of State Kerry delivered a stark warning to North Korea on Friday not to test-fire a mid-range missile, while tamping down anxiety caused by a new U.S. intelligence report suggesting significant progress in the communist regime's nuclear weapons program.(AP Photo/Paul J. Richards, Pool)

U.S. Secretary of State John Kerry delivers remarks to U.S. Embassy staff at a "Meet & Greet" shortly before leaving Seoul, South Korea, Saturday, April 13, 2013. U.S. Secretary of State Kerry delivered a stark warning to North Korea on Friday not to test-fire a mid-range missile, while tamping down anxiety caused by a new U.S. intelligence report suggesting significant progress in the communist regime's nuclear weapons program.(AP Photo/Paul J. Richards, Pool)  (The Associated Press)

North Korea has denied involvement in a cyberattack that shut down nearly 50,000 computers and servers at South Korean broadcasters and banks last month.

The General Staff of the Korean People's Army issued the denial Saturday through the official Korean Central News Agency. Seoul on Thursday said Pyongyang was responsible for the March 20 computer crash.

The denial comes as tension remains high on the Korean Peninsula. U.S. and South Korean officials say North Korea appears to be preparing to test-launch a mid-range missile that could fly as far as Guam.

The North has released a chain of warlike threats since Seoul and Washington began joint military drills last month. Pyongyang is also angry over new U.N. sanctions punishing it for its Feb. 12 nuclear test.