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North Korea Demands Access to Sunken Warship Investigation

North Korea is demanding South Korea give it access to an investigation that has blamed Pyongyang for sinking a South Korean warship.

North Korea said Saturday it wants its own investigators to review the evidence, and accused South Korea of faking the incident from the beginning.

Pyongyang also denounced a separate investigation being launched by the United Nations Command. The command oversees the 57-year-old armistice between the two countries. It announced Friday it will form a special team to investigate South Korea's claims.

Tensions have been growing between South and North Korea since Seoul accused its Communist rival of firing a torpedo at the Cheonan in March, killing 46 sailors.

On Friday, South Korean President Lee Myung-bak called the incident "a military provocation" and said it was a breach of the 1953 armistice that ended the Korean War.

Seoul is also pressing for U.N. Security Council sanctions or other coordinated action against the North.

North Korea threatened Friday to cut off all ties with South Korea and scrap a bilateral non-aggression pact.

In Tokyo Friday, U.S. Secretary of State Hillary Clinton said the United States is working with Japan, China and South Korea to determine an "international response" to North Korea.

U.S. officials have refrained from calling the attack either an act of war or state-sponsored terrorism.

The United States has about 28,000 troops on the Korean peninsula. U.S. Chairman of the Joint Chiefs of Staff Admiral Mike Mullen said U.S. forces remain at a normal level of readiness.

The area where the South Korean ship sank is near a maritime border designated by the U.N. Command at the signing of the 1953 Korean armistice. Pyongyang has never accepted the border as valid. The two Koreas have fought three naval clashes in the area since 1999.

Some information for this report was provided by Reuters.