North Korean media has warned the South against holding more joint military exercises with the United States near their disputed sea border, PressTV reported.
"The political situation on the Korean peninsula is reaching an uncontrollable extreme level by the frantic provocations of the puppet group. No one can predict what this situation will turn into," said a news reader on the state television.
South Korea plans to stage a naval firing drill, possibly as soon as Monday.
That is going to be the latest in a flurry of exercises by Seoul after Pyongyang's attack on a South Korean island last month. The maneuvers included joint exercises with the United States.
The North has warned that the situation is reaching an uncontrollably extreme level. It says a war between the two Koreas will seriously affect peace and security not only on the Korean Peninsula but in the entire region.
"We are now maintaining maximum self-possession and self-control. If a full-scale war breaks out between the North and South, it will seriously affect peace and security not only on the Korean Peninsula but in the rest of the region," a statement released by the official KCNA added.
The joint military exercise came after an artillery exchange between the South and the North resulted in the deaths of four South Koreans.
North Korea has warned that the war games could bring the Koreas closer to the brink of war.
Pyongyang accuses US President Barack Obama of plotting with regional allies to topple the country's government, insisting that its nuclear program is a deterrent against US forces in the region.