Pyongyang's mouthpiece says North Korean nuclear programmes are only deterrent against the US' military assertions in the region.
The defector, a North Korean soldier, remained in critical condition despite the successful removal of a bullet lodged in his abdominal wall.
Experts believe that activities at the ship-yard over the past year suggest "a prolonged and ongoing shipbuilding program".
US aircraft carrier USS Ronald Reagan, guided-missile destroyers USS Stethem, USS Chafee and USS Mustin are taking part in the massive exercises.
British general said that should the UK be the target of a foreign attack, it would simply "fall over."
North Korea said that Donald Trump should be "sentenced to death by the Korean people" following his attack on Kim Jong un.
The new alerts come amid rising tensions between the US and North Korea over Pyongyang's rapid advancement of its nuclear programme and defiant missile tests.
The US president said his gruelling five-nation tour has been "tremendously successful" touting unconfrimed dollar figures.
A North Korean soldier was shot in the elbow and shoulder by his fellow troops as he defected to South Korea through the demilitarised zone on Monday (13 November).
Hacking groups linked to North Korea will continue to devastate the UK with major cyberattacks over the next year, former GCHQ director Robert Hannigan has warned.
Decline in birth rate in South Korea and the lack of interest among youth in building lasting relationships reportedly prompted academicians to frame the course.
Three burglars assaulted a North Korean diplomat's house in Islamabad and made away with a huge stash of alcohol worth $150,000.
"I swear, I thought I was reading a tweet from a troll account," one Twitter user wrote. Another added: "All that's missing is 'Dear Diary...' at the beginning."
Philippines President Rodrigo Duterte and US President Donald Trump met officially on the sidelines of the 31st Association of Southeast Asian Nations Summit.
Maritime exercises are being conducted by the supercarriers USS Ronald Reagan, USS Theodore Roosevelt and USS Nimitz in the region.
US President Donald Trump responds on Twitter after North Korean mocks him again by calling him a "dotard".
Chinese President Xi Jinping gave a lavish red-carpet treatment to the visiting leader and billed the trip as a "state-visit plus".
The US president, who is in South Korea as part of his Asia tour, warned Pyongyang that its nuclear programmes are putting North Korea in "grave danger".
One year on from Donald Trump's shock election win, we take a look back at a chaotic year for the US and the world.
Escapees told Research Association of Vision of North Korea recent tests in Kilju, North Hamgyong Province, are contaminating the surrounding area - with devastating consequences.
The nuclear-powered supercarriers USS Nimitz, Ronald Reagan and Theodore Roosevelt will soon be seen practising wargames in the Western Pacific.
Satellites spotted "significant movement" of equipment and materials at the nuclear site's West Portal, which contains a so-far unused tunnel.