Monday’s incident was reported to be the first border incursion ... s Republic of Korea (North). Instead, any travel requires going through a third-party state—usually China or Russia.

The two countries have vowed to expand bilateral relations after North Korea sent troops and weapons in support of Russia’s ...

The motive for Tuesday's border crossing by North Korean soldiers wasn't immediately clear. The 155-mile-long, 2.5-mile-wide DMZ is the world's most heavily armed border. An estimated 2 million ...

South Korean troops fired warning shots at the Demilitarized Zone on Tuesday after 10 North Korean soldiers — some carrying weapons — were spotted crossing the border. Seoul was on high alert ...