By Christine Kim and Joyce Lee
SEOUL (Reuters) - North Korea intensified threats of an imminent conflict against the United States and the South on Tuesday, warning foreigners to evacuate South Korea to avoid being dragged into a "merciless, sacred, retaliatory war".
The North's latest antagonistic message belied an atmosphere free of anxiety in the South Korean capital, where the city center was bustling with traffic and offices operated normally.
Pyongyang has shown no sign of preparing its 1.2 million-strong army for war, indicating the threat could be partly intended to bolster Kim Jong-un, 30, the third in his family to lead the reclusive country.
None of the embassies in Seoul appeared to have issued any directives to their nationals after the warning and airlines reported no changes in their schedules. Schools catering to foreign pupils worked without interruption.
The warning, read out on North Korea's state television in a bulletin that interrupted normal programming, was the latest threat in weeks of high tension following U.N. sanctions slapped on Pyongyang for its latest nuclear arms test.