US holds drills with allies off Korean peninsula, Pyongyang vows to bolster navy

The United States, South Korea and Japan staged joint naval missile defence drills off the Korean peninsula on Tuesday, as North Korea accused Washington and its allies of creating “the most unstable waters with the danger of a nuclear war.”
The three nations staged exercises in international waters off South Korea’s southern Jeju island to improve their ability to detect and track targets, and share information in the event of provocation by Pyongyang, South Korea’s military said.
The drills come as North Korean leader Kim Jong Un has called for “radically” modernising the weapons and equipment of its naval forces, criticising an increased presence of U.S. strategic assets in the region.