Satellite images released this week show that North Korea is digging mysterious trenches along its southern border, capturing the attention of analysts.

Up to this point, there is no peace agreement between North Korea and South Korea, only a fragile ceasefire that is prone to violation.

The EU's foreign policy chief Josep Borrell met with South Korean officials to discuss security and defense amid concerns over North Korean troops aiding Russia in the Ukraine conflict. Talks also examined potential military compensation from Moscow to North Korea and Seoul's strategic response to these developments.

South Korea fired a short-range surface-to-surface ballistic missile into the Yellow Sea in response to North Korea's recent series of missile launches, Seoul's Joint Chiefs of Staff said Friday.