The pilot of a small private plane that crashed in a residential neighborhood of San Diego earlier this week faced fog as he attempted to land, while runway lights and a weather alert system at the airport were not working,

Investigators are piecing together the final moments before a small private jet crashed into a San Diego neighborhood, killing all passengers on board. According to the NTSB, the skies were foggy, and that the destination airport’s runway approach lights and automated weather reports were not functioning properly.

The National Transportation Safety Board is sharing more details about the private plane crash in San Diego that killed six people. The NTSB says there was heavy fog and the runway lights were out when the plane landed in the dark.