A joint South Korea-U.S. investigative team looking into the three unmanned aerial vehicles that were discovered in South Korea over a two-week period starting in late March has stated definitively that they were sent from the North.
The team's report says the drones were headed back when they crashed after running out of fuel.
The GPS coordinates of the UAVs show that they flew over key military facilities and took dozens of pictures, a clear violation of Korea's armistice agreement and the non-aggression pact, which forbids the North and South from infiltrating each other's airspace.
South Korea's defense ministry called it a clear military provocation and they plan to submit the results of their findings to the United Nations.
North Korea has hundreds of unmanned aerial vehicles in its possession and dozens of others are believed to have flown over the South before returning safely to the North.
When modified, experts say these surveillance purpose drones could hold up to ten kilograms of explosives.
It's raised concerns about possible attacks, and the South Korean military admits a gap in its security.
While it says it's well equipped to deal with enemy jet incursions and attack UAVs, they have a much harder time detecting these smaller drones.
Seoul says it plans to purchase low-altitude radar and other military gadgetry to prevent further infiltrations.
Kim Hyun-bin, Arirang News.