12 UFOs spotted hovering North of Seoul before speeding off North into restricted airspaceWe were watching fireworks from a top a mountain with a large group. I looked back at my girlfriend and noticed something in the sky that did not appear to by an airplane. It was very dim at first but white in light, oval shaped. There were no navigational beacons blinking. It was moving too slow, suddenly another appeared, then another. Eventually there were 12 of them, all in close proximity at different altitudes and appeared to be stationary. Then they moved around again and started moving due North toward North Korea. Nothing flies North here, and we were North of Seoul, not in any flight patterns for approaching or departing aircraft, so I was very puzzled. They then stopped again and half of them disappeared. 6 of them remained stationary for 6 minutes, not moving then shot off north very fast and disappeared.