SEOUL, June 30 (UPI) -- North Korea, under U.N. sanctions for its nuclear tests, may be going ahead with enriching uranium to add to its arsenal.

SEOUL, Feb. 20 (UPI) -- South Korea would respond quickly and forcibly to any attack by North Korea along the disputed Yellow Sea border, Defense Minister Lee Sang-hee warned Friday.

SEOUL, Feb. 16 (UPI) -- South Korea should join an international effort led by the United States to interdict transfers of banned nuclear weapons technology, a Seoul official says.

SEOUL, Jan. 1 (UPI) -- South Korea Defense Minister Lee Sang-hee warned his troops Thursday to be ready for possible conflict with North Korea over a coastal dispute.

WASHINGTON, Oct. 19 (UPI) -- The United States has promised that it would send more soldiers to South Korea in the event of a military threat, officials said.

SEOUL, Aug. 29 (UPI) -- The arrest in South Korea of a North Korean spy disguised as a refugee highlights Pyongyang's never-ending espionage activities, despite Seoul's decade-long reconciliation efforts, Seoul officials said Thursday.

BOSTON, Aug. 7 (UPI) -- A team of U.S., Korean, and German scientists says it has halted the spread of the human immunodeficiency virus in mice by using a novel type of RNA.

SEOUL, June 2 (UPI) -- A change in command and changes in U.S.-South Korean relations topped the agenda of U.S. Defense Secretary Robert Gates' visit to Seoul, officials said.

SEOUL, May 31 (UPI) -- The defense minister of South Korea Saturday asked the global community to take part in the fight against terrorist threats in Northeast Asia.