The weather alert system and runway lights weren’t working at a foggy San Diego airport where a private jet was planning to land before it crashed into a neighborhood, NTSB officials said Friday, adding that they haven’t yet determined the cause of the crash.

Runway lights and an automated system that provides weather conditions was out of operation at Montgomery-Gibbs Executive Airport before a Cessna crashed into a San Diego neighborhood amid foggy conditions,

All six on the plane are believed to be dead, including a former drummer for The Devil Wears Prada and a high-profile music agent.