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 “thermonuclear war.”

With tensions on the Korean Peninsula soaring to include threats of nuclear war, frustration is mounting at what U.S. policy experts see as the failure of all efforts to rein in North Korea.

North Korea warned foreigners in South Korea on Tuesday to quit the country because they were at risk in the event of conflict, the latest threat of war from Pyongyang.

North Korea suspended its sole remaining major project with the South on Monday, after weeks of threats against the United States and South Korea, as Russian President Vladimir Putin said any nuclear conflict could make Chernobyl look like a fairy tale.

The lesson from the history of totalitarianism is clear: The controlling logic behind the acts of a closed regime is paranoia. It sees enemies everywhere. North Korea's unusually bellicose statements and provocative actions of late may be best understood, then, as paranoid — but, to borrow Henry Kissinger's infamous phrase, even a paranoid has real enemies.

Unprecedented Chinese criticism of North Korea is unlikely to mean tough new action against Pyongyang because if China pushes too hard and its troublesome neighbor collapses, the result would be disastrous for Beijing.

A top South Korean security official said Sunday that North Korea may test-launch a missile this week, as the United States delayed its own missile test due to soaring tensions on the peninsula.

South Korea's top military officer has put off a visit to Washington because of escalating tensions with North Korea that have also compelled more than a dozen South Korean companies to halt operations at a joint factory complex in the North, officials said Sunday.

South Korea's top military officer has put off a visit to Washington because of escalating tensions with North Korea that have also compelled more than a dozen South Korean companies to halt operations at a joint factory complex in the North, officials said Sunday.

Staff at embassies in North Korea appeared to be remaining in place on Saturday despite an appeal by authorities in Pyongyang for diplomats to consider leaving because of heightened tension after weeks of bellicose exchanges.