Dense fog had rolled into the area around the time the plane was approaching the airport. Visibility was at half a mile at 3:55 a.m. and had dropped to a quarter of a mile just after 4 a.m. in the area around Marine Corps Air Station Miramar, which is just a few miles north of the crash site, according to the National Weather Service.

Authorities say a private plane clipped power lines before slamming into a home in San Diego. The crash killed the co-founder of a music talent agency and two of its employees and ignited cars in a neighborhood of U.