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SEOUL, South Korea — North Korea fired over its heavily fortified southern border Friday, and South Korea retaliated in a rare instance of their cold war turning hot less than two weeks before President Barack Obama and other world leaders are due in Seoul for a global economic summit.
It was unclear late Friday whether North Korea’s firing of 14.5mm rounds at a South Korean guard post in the Demilitarized Zone was an accident or an intentional provocation, an official with the Joint Chiefs of Staff in Seoul said.
