North Korean leader Kim Jong-Un (L) inspects a combined strike drill of the three services of the Korean People's Army
Fears are growing that a planned nuclear test by North Korea may be imminent.
State news reports from the capital Pyongyang claim that the North Korean leader Kim Jong-Un has presided over meeting at which "important decisions" regarding the country's military were made.
According to Pyongyang's Korean Central News Agency (KCNA), Kim chaired an "enlarged meeting" of the country's Central Military Commission, reports Sky News.
The English-language version of the report did not say when or where the meeting was held, but claimed senior military members of the commission were all present.
The state report read: "Kim Jong-Un made an important concluding speech, which serves as guidelines for further strengthening the (North's Korean People's Army) into a matchless revolutionary army."
In neighbouring South Korea, President Lee Myung-bak has ordered government agencies to be on the alert.
Lee, who will leave office in the next two weeks, made his comments at an unannounced visit to the underground bunker of the presidential compound.
Pyongyang has been threatening to conduct a nuclear test for some time.
However, plans for the test, the third since 2009, appear to have been accelerated since the latest round of UN sanctions against the country, themselves prompted by the surprisingly successful rocket launch by Pyongyang in December.
Last week, satellite imagery of the Punggye-ri nuclear test facility in North Hamgyong province seen by the South Korean intelligence officials suggested that covers had been placed over a tunnel entrance.