South Korea responds as North Korea fires 23 missiles in a day

In an escalation of hostilities, North and South Korea have fired a number of missiles into waters near each other's coasts.

North Korea launched at least 23 missiles in a single day, including one that landed less than 60 kms off the South Korea's city of Sokcho.

South Korea responded with warplanes firing three air-to-ground missiles over the disputed maritime demarcation line.