North Korea: US 'not engaging in war of rhetoric'
5 April 2013 Last updated at 17:40 BST
North Korea has told foreign embassies in Pyongyang it cannot guarantee their safety in the event of conflict, and to consider evacuating their employees.
Both Russia and the UK said they had no immediate plans to evacuate their Pyongyang embassies.
The North's move comes amid threats to attack US and South Korean targets.
The BBC's Rajesh Mirchandani said that Washington was not engaging in the war of rhetoric coming from the North Koreans.