Watch your tongue, North Korea warns South's new leader

SEOUL (Reuters) - North Korea warned South Korea's new president to "watch her tongue" on Wednesday, as tension between the two sides mounts, reprising the kind of vitriolic language that it dished out to her predecessor on a regular basis.

North Korea has in recent days threatened the United States with nuclear war and rehearsed drone attacks on South Korea, prompting Washington, involved in military drills with the South, to say it is ready for any contingency.