The new intercontinental ballistic rocket engine could give the country the power to target the U.S. with nuclear strikes, NBC News reports.
North Korea can mount a nuclear warhead on a medium-range missile, a South Korean official said on Tuesday.
The isolated country says it will keep defying the US and its allies by continuing its nuclear and ballistic missile program.
China must ratchet up pressure on the rogue nation to prevent further international unrest, warns Ramesh Thakur of the Centre for Nuclear Non-Proliferation and Disarmament.
A state-controlled newspaper tells North Koreans to prepare for economic hardships ahead.
CNBC's Eunice Yoon reports on how growing political tensions are affecting the work of Christians in towns near the China-North Korea border.
Donald Trump said that if elected, he might halt oil purchases from Saudi Arabia and other Arab allies unless they commit troops to fight Islamic State. The New York Times reports.
South Korea's military says North Korea fired multiple short-range projectiles into the sea.
Investors are unperturbed by Pyongyang's ballistic missile launch, with the Kospi slightly higher and the won flat against the dollar.
Barack Obama imposed new sanctions on North Korea on Wednesday intended to isolate the country's leadership after recent provocations by Pyongyang
North Korea's highest court sentenced an American tourist to 15 years in prison with hard labor.
Otto Warmbier, a 21-year-old University of Virginia undergraduate student, was convicted after being charged with subversion.
North Korean leader Kim Jong Un says his country will soon conduct a nuclear warhead test in addition to a test launch of ballistic missiles.
Kim Jong Un said his country would conduct a nuclear warhead test and a test launch of ballistic missiles, the KCNA news agency reported.
Kim Jong Un ordered the country to improve nuclear attack capability by continuing to conduct more tests, the offical KCNA news agency reported.
North Korea fired two short-range ballistic missiles into the sea off its east coast city of Wonsan early on Thursday, South Korea's military said.
American troops conducted live fire drills near the border with North Korea and Iran is testing long range ballistic missiles, reports CNBC's Brian Sullivan.
Kim's comments were his first direct mention of the claim to have successfully miniaturized a nuclear warhead to be mounted on a ballistic missile.
The isolated country threatens to launch an 'all-out offensive' against the US and South Korea.
The North Korean leader ordered his country to be ready to use its nuclear weapons at any time, according to official media.