Seoul says Pyongyang must show 'action' to win sanctions relief

South Korean foreign minister Kang Kyung-wha said Friday that Pyongyang needs to show "visible, concrete and substantial" denuclearisation action if it wants sanctions relief, as the North's deadlock with the United States continues.Kang's comments at a press conference come just days after a senior North Korean official warned Washington of an "unwanted outcome" if it didn't adjust its stance on economic sanctions.Washington and Pyongyang have been at loggerheads since the collapse of a summit