‘Unusual Activity’ Detected in North Korea May Indicate Submarine Missile Test

US defense officials say that North Korea’s next missile test could happen under water, as Pyongyang appears to be gearing up for submarine-based launches in the near future.

US Nuclear Submarine Headed to South Korea, US Defense Official Says

The USS Michigan — a guided-missile submarine — arrived in South Korea for what a US defense official described as a show of force amid tensions between the US and North Korea.

Pakistan shows concern at Indian nuclear submarine test

Pakistan has showed serious concerns at the recent Indian tests of a Submarine Launched Ballistic Missile and development of a nuclear submarine fleet.