North Korea has declared a “state of war” with South Korea in their latest round of rhetoric.

Few are taking the declaration seriously as North Korea has been threatening South Korea in some form since a nuclear test in February. Technically the war between the nations has never ended because the armistice in 1953 was never turned into a peace treaty.

The U.S. National Security Council released a statement saying they’d heard about “reports of a new and unconstructive statement from North Korea.”

The U.S. had flown B-2 bombers to South Korea last week in what was believed to be a warning to North Korea. Unconfirmed reports have U.S. F-22 Stealth Fighters flying to South Korea to join military exercises in the region.

North Korea reportedly has revised a attack plan to target U.S. bases in Hawaii, Guam and South Korea.