BBC News - North Korea warns of nuclear 'sacred war': "North Korea says it will use its 'nuclear deterrent' in response to joint US-South Korean military exercises this weekend.
Pyongyang was ready to launch a 'retaliatory sacred war', the state-run Korean Central News Agency (KINA) said, quoting defence officials.
Washington and Seoul say the war games are to deter North Korean aggression.
Tensions between the two Koreas have been high since the sinking of a South Korean warship in March.
'All these war manoeuvres are nothing but outright provocations aimed to stifle the Democratic People's Republic of Korea [North Korea] by force of arms,' KCNA reported the powerful National Defence Commission as saying.
'The army and people of the DPRK will start a retaliatory sacred war of their own style based on nuclear deterrent any time necessary in order to counter the US imperialists and the South Korean puppet forces deliberately pushing the situation to the brink of a war.'
The BBC's John Sudworth, in Seoul, says it is not the first time that North Korea has issued such a warning."