North Korea has warned that it will take strong measures against any attempts to bring down its Socialist system.

The North's Ministry of People's Security and the Department of State Security on Monday issued a joint statement, saying attempts to destabilize the North Korean regime have passed dangerous levels.

The statement said the North will take all-out measures to defend itself and its Socialist system from all hostile forces.

The North also threatened that it is armed with world-class ultra-modern striking force that has not yet been publicly revealed.

In addition, the North blasted the South for alleged "subversive plots" to overthrow the North Korean regime, warning of strong actions to crush them.

The statement also called on Seoul to immediately dissolve the National Intelligence Service and the Unification Ministry.