The KT-1 trainer planes crashed near Sacheon town, about 300 kilometres south of the capital Seoul, according to military authorities.
The launch was Pyongyang’s ninth round of weapons tests in 2022 as it continues to use a pause in diplomacy to expand its military capabilities.
Last month, DPRK carried out a record nine missile launches and tested a developmental hypersonic missile and a submarine-launched missile.
Second powerful typhoon to slam Japan in a week unleashes fierce winds and rain on southern islands, blowing off rooftops and leaving homes without power as it edged northward into an area vulnerable to flooding and mudslides.
Japan is bracing for a dangerously powerful typhoon approaching its southern regions this weekend on the heels of an earlier storm that injured dozens of people in the country and on the Korean Peninsula.
The string of weapons drills come as a prolonged hiatus in disarmament talks with the United States drags on, and despite recent overtures from Washington offering help to contain the pandemic.
North Korea launched multiple projectiles into the sea earlier this month as part of firing drills, according to South Korea's military, drawing US and Chinese appeals for Pyongyang to return to talks on ending its nuclear and missile programmes.
Donald Trump has one less hawk in his administration, that much is certain. What is unclear is whether it means a less combative foreign policy with countries like Iran or Venezuela.
North Korean leader Kim Jong-un oversaw the test of a "super-large multiple rocket launcher", state news agency KCNA reports.
The test verified the combat effectiveness of the overall system, and North Korean leader Kim Jong-un predicted "it would be an inescapable distress to the forces becoming a fat target of the weapon", state news agency KCNA said.
Kim and his wife were among the elite at the premiere of the games on Monday in Pyongyang, but North Korea's leader was unhappy with the event's organisers, state media said.
"China can and should have a cooperative relationship with the rest of the region," US Acting Defence Secretary Patrick Shanahan said at the Shangri-La Dialogue in Singapore.
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