The Joint Chiefs of Staff said the missiles were launched 10 minutes apart in a northeastern direction from the town of Jangyon in southeastern North Korea
It said the first missile flew 600 kilometres (370 miles) and the second missile 120 kilometres (75 miles), but didn't say where they landed. North Korea typically test-fires missiles toward its eastern waters, but the second missile's flight distance was too short to reach those waters
South Korean media said an unidentified South Korean military source reported that it was highly likely the second missile crashed in an inland area of the North. Possible damages on the North's ground weren't immediately reported
The reports said the first missile landed in the waters off the North's eastern city of Chongjin
South Korea's Joint Chiefs of Staff, which did not comment on the media reports, said South Korea maintains a firm readiness to repel any provocations by North Korea in conjunctions with the military alliance with the United States
The launch came two days after South Korea, the US and Japan ended their new multidomain trilateral drills in the region
In recent years, the three countries have been expanding their trilateral security partnership to better cope with North Korea's evolving nuclear threats and China's increasing assertiveness in the region
The "Freedom Edge" drill was meant to increase the sophistication of previous exercises with simultaneous air and naval drills geared toward improving joint ballistic-missile defence, anti-submarine warfare, surveillance and other skills and capabilities. The three-day drill involved a US aircraft carrier as well as destroyers, fighter jets and helicopters from the three countries
On Sunday, North Korea's Foreign Ministry issued a lengthy statement strongly denouncing the "Freedom Edge" drill, calling the US-South Korea-Japan partnership an Asian version of NATO. It said the drill openly destroyed the security environment on the Korean Peninsula and contained a US intention to lay siege to China and exert pressure on Russia
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