North Korea announced Saturday that it was in a state of war with South Korea, according to official media.
It said all inter-Korean issues would be dealt with in a wartime manner, DPA reported.
The Korean Central News Agency saud the military was waiting for further orders from leader Kim Jong Un.
On Friday, Kim issued orders to prepare strategic missiles for attack on the United States and South Korea. Pyongyang was reacting to a show of force by US stealth fighters that flew a 20,000-kilometre round trip to drop dummy bombs onto a South Korean training ground.