North Korea said Wednesday that leader Kim Jong Un has recently supervised ballistic missile tests on the assumption of making pre-emptive strikes against South Korea.

North Korea's official media reports did not say when the tests took place, but they were most likely referring to the country's test-firing Tuesday of three ballistic missiles — two short-range Scuds and one medium-range Rodong.

"The drill was conducted by limiting the firing range under the simulated conditions of making pre-emptive strikes at ports and airfields in the operational theater in (South) Korea where the U.S. imperialists nuclear war hardware is to be hurled," the state-run Korean Central News Agency said.