Mounting tensions on the Korean Peninsula reached a new level Tuesday as a North Korean agency announced that the communist nation is severing all ties with its neighbor to the south and will "abrogate the agreement on non-aggression."
A spokesman for North Korea's Committee for the Peaceful Reunification of Korea accused South Korean President Lee Myung-bak of falsely blaming Pyongyang for the sinking in March of the South Korean warship Cheonan, according to the state-run Korean Central News Agency.
An official South Korean report said the North fired a torpedo at the warship, killing 46 sailors. Since then relations between the Koreas has turned increasingly frosty.
Lee has already announced that South Korea was suspending trade with North Korea, closing its waters to the North's ships and adopting a newly aggressive military posture toward its neighbor.
While in China on Monday, U.S. Secretary of State Hillary Clinton said the United States supports the finding on the Cheonan's sinking.
She urged North Korea on Monday to reveal what it knows about the "act of aggression." She also said the United States' "support for South Korea's defense is unequivocal" and that North Korea should "stop its belligerence and threatening behavior."
U.S. President Barack Obama has directed military commanders to work with South Korean troops "to ensure readiness and to deter future aggression" from North Korea.