SEOUL -- Cold War tensions mounted between North and South Korea on Sunday after a deadly sea clash which the South's top military officer warned could have become an all-out war.
A South Korean destroyer and other navy boats cruised near the disputed maritime frontier where Saturday's gunbattle left four South Korean sailors dead, one missing and 19 wounded, many seriously, Seoul officials said.
The United States and other nations expressed concern but South Korea's President Kim Dae Jung went ahead with a visit to Japan, despite the blow to his "Sunshine Policy" of peaceful engagement with the communist North.
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