North Korean leader Kim Jong-un on Wednesday warned that war could break out "without any prior notice," the official KCNA news agency reported.
Kim was speaking during an inspection of a command post on the 22nd anniversary of his father Kim Jong-il's ascent to supreme commander.
After looking around the unit's facilities, Kim told soldiers to improve combat readiness and never forget that war could break out without warning.
On Dec. 16, military Politburo chief Choe Ryong-hae made the same comments at a loyalty rally marking the second anniversary of Kim senior's death.
The unit Kim visited on Wednesday is headquartered in Nampo, South Pyongan Province and its main duty is to defend the outskirts of Pyongyang.
Kim was accompanied by a new troika who appear to be propping up his throne after the execution of his uncle Jang Song-taek -- Choe, chief of the Army's General Staff Ri Yong-gil, and Minister of the People's Armed Forces Jang Jong-nam.
It was Kim's first visit to a military unit since Nov. 30.