[Updated at 8:22 a.m. ET] North Korea's announcement that it would restart all the facilities at its Yongbyon nuclear complex was followed by a plea for calm from United Nations Secretary-General Ban Ki-moon, who is himself South Korean.
Ban said he was "deeply troubled."
"The current crisis has already gone too far," he said in a statement from Andorra. "Nuclear threats are not a game. Aggressive rhetoric and military posturing only result in counter-actions, and fuel fear and instability.
[Posted at 2 a.m. ET] North Korea said Tuesday that it plans to restart all the facilities at its Yongbyon nuclear complex, including a uranium enrichment plant and a reactor that was shut down in 2007.
The announcement follows a new strategic line set out at a recent meeting of a key committee of the ruling Workers' Party of Korea on Sunday, the North's state-run Korean Central News Agency (KCNA) reported Tuesday.FULL STORY
The South Korean president on Monday warned North Korea that any provocative moves will be met with "a strong response" as the United States deployed stealth fighter jets in the tense region as part of joint military exercises.
"If there is any provocation against South Korea and its people, there should be a strong response in initial combat without any political considerations," President Park Geun-hye said at a meeting with senior defense and security officials, according to her office.FULL STORY
North Korea has entered a "state of war" with neighboring South Korea, according to a report from the state-run Korean Central News Agency.
North and South Korea technically remain at war since their conflict between 1950 and 1953 ended with an armistice and not a peace treaty. On March 11, the North Korean army declared the armistice agreement invalid.FULL STORY
North Korea said Wednesday it was cutting off an important military hotline with South Korea amid high tensions between the two sides.
"Under the situation where a war may break out any moment, there is no need to keep north-south military communications," the head of a North Korean delegation told the South by telephone on Wednesday, according to the North's state-run Korean Central News Agency.
Earlier this month, Pyongyang disconnected a humanitarian hotline that ran through the border village of Panmunjom, according to the South Korean Unification Ministry.FULL STORY
North Korea on Tuesday served up its latest round of threats against the United States, saying it plans to place military units on combat ready status to prepare for possible strikes on U.S. bases.
The North Korean Supreme Command "will put our military on number one combat ready status with strategic rocket units and long-range artillery unit to prepare for possible strikes against the U.S. mainland, Hawaii and Guam and other American and South Korean military units in the Pacific," the state-run Korean Central News Agency reported.FULL STORY
North Korea reacted with indignation to a United Nations decision to investigate allegations of human rights abuses inside the isolated state, claiming it has one of the best systems worldwide for protecting citizens' rights.
The United Nations Human Rights Council in Geneva said delegates agreed Thursday to set up a commission of inquiry to examine what it called "grave, widespread and systematic" violations of human rights in North Korea.FULL STORY
The North Korean military on Thursday issued a fresh burst of ominous rhetoric, warning that U.S. bases in Guam and Japan are within its "striking range."
The statement from the Supreme Command of the Korean People's Army, carried by the North's state-run news agency, follows the announcement by the United States this week that its B-52 bombers were making flights over South Korea as part of military exercises.FULL STORY
The suspected cyber attack that appeared to target South Korean banks and broadcasters Wednesday originated from an IP address in China, South Korea's Communications Committee said in a statement Thursday.
The attack damaged 32,000 computers and servers of media and financial companies, the committee said.
South Korean officials are analyzing the cause and are working to prevent any further damage, the committee said.
The attack infected banks' and broadcasters' computer networks with a malicious program that slowed or shut systems down, officials and the semiofficial Yonhap News Agency said.FULL STORY
A new North Korean propaganda video shows images of what appears to be an imagined missile attack on U.S. government buildings in Washington, including the White House and the Capitol.
The roughly 4-minute video was posted Monday in the YouTube channel of the North Korean government website Uriminzokkiri.
It carries a montage of clips of different weapons, including artillery guns firing and large missiles on display at military parades.
Just before the 3-minute mark, it cuts to footage of target sights honing in on the White House and then a simulated sequence of the Capitol's dome exploding.FULL STORY
The United States' plans to beef up its missile defenses against North Korea are likely to inflame tensions that are running high over Pyongyang's nuclear program, China said Monday.
"Bolstering missile defenses will only intensify antagonism, and it doesn't help to solve the issue," Hong Lei, a spokesman for the Chinese Ministry of Foreign Affairs, said at a regular news briefing in Beijing.FULL STORY
A day after the United States promised new missile defense interceptors to guard against a North Korean attack, Pyongyang responded Saturday by blasting the Americans' "hostile policy" and saying it won't negotiate with them over its nuclear program.
"(North Korea's) nuclear weapons serve as an all-powerful treasured sword for protecting the sovereignty and security of the country," a foreign ministry spokesman said, according to the state-run KCNA news agency. "Therefore, they cannot be disputed ... as long as the U.S. nuclear threat and hostile policy persist."FULL STORY
The United States will deploy additional ground-based missile interceptors as part of efforts to enhance the nation's ability to defend itself from attack by North Korea or Iran, Defense Secretary Chuck Hagel announced Friday.
Still relatively new in his post, the Pentagon chief told reporters that 14 additional interceptors would bring the total to 44. He said the expansion should be completed by 2017.
Part of the move would involve reopening a missile field at Fort Greely, Alaska, Hagel said.FULL STORY
South Korea is keeping a close watch on North Korean moves "as there are possibilities that these activities could lead to provocations," South Korean Defense Ministry spokesman Kim Min-suk said Tuesday.
The South is also making sure its combined forces with the United States are prepared in case of such provocation, in which "we will respond in a more resolute and destructively manner," the spokesman said.FULL STORY
[Updated at 7:39 a.m.] North Korea has taken a step it's warned about for a few days: It declared invalid the armistice agreement that ended the Korean War in 1953.
That news, from the official newspaper of the country's ruling Workers' Party, comes four days after the U.N. Security Council passed tougher sanctions against North Korea in response to its February 12 nuclear test.
It remains to be seen whether the invalidation means that either North Korea or South Korea can resume hostilities. However, the North has nullified the agreement on several occasions in the past.
[Posted at 3:57 a.m.] Joint military exercises between South Korea and the United States began Monday, the South Korean defense ministry said.
The latest military drills involving the two allies are called Key Resolve and follow the Foal Eagle joint exercises that began March 1, which are scheduled to last two months.
North Korea has called the annual training exercises "an open declaration of a war," but South Korea says it notified Pyongyang that the drills "are defensive in nature."FULL STORY
The U.N. Security Council voted unanimously on Thursday for a resolution strengthening sanctions on North Korea.
The Security Council resolution targeting North Korea and its nuclear program includes tough new financial sanctions, travel restrictions, and inspection powers.
"These sanctions will bite and bite hard," U.S. Ambassador to the U.N. Susan Rice told reporters after the unanimous resolution vote on Thursday.FULL STORY
$85 billion in automatic across-the-board spending cuts became law last week, as President Obama and Congress struggle to find a solution to the crisis. Watch CNN.com Live for continuing coverage on this story.
Today's programming highlights...
10:00 am ET - North Korea policy hearing - As North Korea makes new threats amid possible U.N. sanctions over its nuclear ambitions, the Senate Foreign Relations Committee meets to discuss existing U.S. policy toward Pyongyang.
The United States and China reached a tentative deal for a proposed U.N. Security Council resolution on more sanctions for North Korea after its latest nuclear test, a senior Obama administration official told CNN.
The full council is expected to deal with the issue on Tuesday.FULL STORY
North Korea is not pleased with U.S.-led moves to slap new sanctions against it over its recent nuclear test - and because of this it's threatening to end its 60-year truce with South Korea, the South's Yonhap news agency reported.
The North's military said Tuesday it will also cut off direct phone links with South Korea at the inter-Korean border village of Panmunjom, Yonhap said, citing North Korea's news outlet. Both North and South Korea have technically been at war for decades. The 1950-53 civil war ended in a truce.
The U.N. Security Council is expected to meet Tuesday to consider a proposed resolution to authorize more sanctions against North Korea following the secretive regime's controversial nuclear test last month.FULL STORY
Ahead of annual, routine military exercises between South Korea and the United States, North Korea issued its usual caustic objections Saturday.
Though customary, the stark posturing by the North stands in the shadow of an underground nuclear test two weeks ago, which was preceded by the launch of a long-range missile capable of transporting a warhead.FULL STORY