North Korea on Tuesday launched a salvo of strident criticism — as well as two apparent short-range ballistic missiles — conducting its fourth weapons test in less than two weeks and blasting Washington and Seoul over joint military exercises.

The South Korean military said it had detected the two launches, which it said were "presumed to be short-range ballistic missiles" from the vicinity of Kwail County in South Hwanghae province at 5:24 a.m. and 5:36 a.m. Both missiles landed in the Sea of Japan.

"We detected the altitude of short-range missiles launched this time was around 37 km, the flying distance was around 450 km, and the maximum flying speed was mach 6.9 or higher," the South Korean Joint Chiefs of Staff said in a statement.