Pyongyang on Sunday again denied its involvement in, and called for a joint probe into, the deployment of small drones found crashed near the inter-Korean border, which Seoul has said were sent from North Korea. The denial came three days after Seoul's defense ministry said the three crude unmanned aerial vehicles (UAVs) were sent from North Korea, based on an analysis of the drones' global positioning system data. A team of experts from South Korea and the United States found that the drones' departure and intended returning points were in North Korea, the military said.