North Korean leader Kim Jong Un told his top military officers to use maximum force against South Korea and the United States if they initiate a military confrontation, state media reported Monday.

Seoul and Washington have ramped up defense cooperation in the face of a record-breaking series of weapons tests by Pyongyang over the past year.

At a meeting with North Korea's major commanding officers in Pyongyang on New Year's Eve, Kim said his military should "annihilate" the enemy if provoked, the official Korean Central News Agency (KCNA) reported.