South Korean authorities have launched an investigation focused on the possibility ‍civilians may have flown drones that North Korea said violated its airspace, ‍the Defense Ministry said on Monday.President Lee Jae Myung has vowed a swift probe and said on Saturday if civilians had indeed operated the unmanned aircraft, it would be a “serious crime” ⁠that threatened South Korea’s security and peace on the Korean peninsula.For all the latest headlines, follow our Google News channel online or via the app.South Korea is willing to jointly conduct the investigation with North Korea but has not made the proposal, a defense ministry spokesperson said citing Minister Ahn Gyu-back.North Korea has not responded to previous attempts by Lee’s government to initiate dialogue.North ‍Korea’s military on Saturday accused the South of “acts of provocation” by sending the ‍drones, ‍saying it had shot down ⁠the aircraft and disclosed ‌what it said were ⁠pieces of the drones ‍and aerial photos they