Investigators are still trying to determine the cause of a San Diego plane crash that left at least three people dead and several others injured in the military housing neighborhood of Murphy Canyon on Thursday.

Multiple have died after a business jet crashed into a San Diego neighborhood during foggy weather Thursday morning, authorities said.

“We have jet fuel all over the place,” Dan Eddy, San Diego’s assistant fire chief, said at an early morning news conference. He described the neighborhood as a “gigantic debris field.”