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North Korea has conducted a slew of underwater-launched ballistic missile tests since 2016, but all launches were made from the same 2,000-tonne-class submarine which has a single launch tube. Many experts call it a test platform, rather than an operational submarine in active service.

In a statement issued via state media on Monday, the North Korean Foreign Ministry called the Freedom Shield drills "a dangerous provocative act of leading the acute situation on the Korean peninsula, which may spark off a physical conflict between the two sides by means of an accidental single shot, to the extreme point."

The arrival of the carrier Carl Vinson and its strike group at the South Korean port of Busan was meant to display a solid U.S-South Korean military alliance in the face of persistent North Korean threats, and boost interoperability of the allies’ combined assets, the South Korean navy said in a statement.

North Korea has issued a sharp rebuke over the major military exercise being carried out by the U.S. and its South Korean ally, labeling the training a "war rehearsal." Newsweek reached out to the Pentagon and the South Korean embassy in the U.

North Korea condemned an ongoing U.S.-South Korea joint military exercise Wednesday, saying another incident like Seoul's recent accidental bombing of its own village near the DMZ could lead to "a new armed conflict.

North Korea denounced joint military drills between the US and South Korea saying the South Korean Air Force’s recent bombing mistake shows the risk of the region unintentionally getting dragged into a new armed conflict.