South Korea test fires its domestically-built hypersonic missile amid border row with North

South Korea successfully test-fired its domestically-built hypersonic missile, a move seen as a response to North Korea's recent border mine blast. The test, which was not publicly announced beforehand, comes amidst escalating tensions between the two countries.

The hypersonic missile, capable of flying at speeds over Mach 5, is designed to evade existing air defense systems. It is part of South Korea's efforts to strengthen its military capabilities in the face of growing threats from North Korea.