South Korea police raid spy agency over drone flights into North
Pyongyang accused Seoul of flying a drone into Kaesong in January, releasing images that purported to show debris from the downed aircraft.
Seoul initially denied the government was involved, with President Lee Jae Myung saying it would be akin to "firing a shot into the North".
But authorities said on Tuesday they were investigating three active-duty soldiers and one spy agency employee.
Investigators from a joint military-police task force raided 18 locations of interest, including the Defense...