The soldier crossed the demarcation line that runs through the demilitarised zone dividing the two Koreas.
Britain plans to send Eurofighter Typhoon combat jets, Voyager tanker aircraft and C-17 Globemaster transport aircraft.
Seoul's defence departments pressed into action to purchase or develop laser weapons to down intruding UAVs.
Daniel Russel, assistant secretary of state for East Asia, said the deployment will happen 'as soon as possible'.
The 'red line' for the Chinese is that the North Korean regime shouldn't collapse, researcher says.
South Korea expresses concern Pyongyang could be gearing up for another nuclear test before 2016.
The usually secretive state invited foreign tourists and journalists to its first 'international friendship' event.
Angola, Mongolia, Singapore and Poland to kick out foreign workers, revoke visa-free travel.
China has strongly opposed Thaad in South Korea and has often accused the US of trying to stir up tensions in the Korean peninsula.
Tensions have been rising in the Korean Peninsula since North Korea conducted nuclear test in September.
Seoul asks UN to adopt 'comprehensive' sanctions against Pyongyang and plug loopholes in current measures.
Users of the social bookmarking website got hold of 28 URLs due to a domain name system configuration error.
South Korea believes the reclusive nation is expanded its hacking abilities.
This is the US Air Force's second flight since North Korea carried out its fifth nuclear test recently.
Casualties have been reported from Russia, China, Kuwait and Angola.
Pyongyang's top authority reiterates that the North's nuclear test is to counter threats from the US.
The country has access to up to 150kg of highly enriched uranium a year, enough for roughly six nuclear bombs.
Pyongyang has said that they are 'fully ready' to 'wipe them out to the last man any moment'.
Drivers carrying goods to North Korea said there is increased security now.
North Korea is prone to natural disasters, particularly floods, due to deforestation.
North Korea conducted its fifth nuclear weapons test in violation of UN resolutions.
Pyongyang says US president is the reason why North Korea needs a strong nuclear programme.