Transcript for Alarming Near Miss for 2 Seattle News Choppers as Drone Flies Too High
Now, to the west tonight. The FAA is investigating a near-miss in the skies over Seattle. Two helicopters nearly colliding with a tiny intruder, a drone, violating federal regulations by flying so high and so close. And it's happening more and more, raising real concerns about safety in the skies. ABC's David Kerley, who covers aviation for us, with the tape tonight. Hey, ah, ed, we just got droned. Reporter: An alarming danger for two Seattle news choppers. Got it. Got it. Reporter: A drone, violating regulations. Even flying above our affiliate KOMO 4's helicopter. Look at that guy. He has got to be, what, 1,500 feet? Reporter: That's nearly four times higher than allowed. It is really scary to know something is there and you don't know where it is and you can't see it. Reporter: But a second chopper did see it. He is losing altitude. Reporter: Cameraman Scott crueger was able to follow the small drone as it buzzed over rooftops. I want to figure out who is doing this. He threatened our safety. I have no idea what could have happened if our aircraft had struck that thing. Reporter: Finally, the chase. The mystery leads to a man and a remote control. That is him and his drone. Reporter: As these small drones have multiplied, so have close calls. Many with passenger-carrying jetliners, landing at major airports. Sightings now reaching 25 a month. And the cameraman who caught this drone operator walking into a house is worried. It isn't a matter of if there's going to be a collision between a real aircraft and one of these toys, but a matter of when. Reporter: Law enforcement knocked on the door of the home that this man went into and were told that no one in that Seattle area home had a drone. The FAA has now joined this investigation, and will determine if this case will end in a warning or legal action. Amy? David Kerley, thank you.
This transcript has been automatically generated and may not be 100% accurate.