A National Transportation Safety Board investigator said both the runway lights and an automated weather-notification system at the destination airport were inoperable when the Cessna 550 plowed into the Murphy Canyon neighborhood at about 3:45 a.

The NTSB says there was heavy fog and the runway lights were out when the plane landed in the dark.

Investigators are piecing together the final moments before a small private jet crashed into a San Diego neighborhood, killing all passengers on board.