This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

EL CAJON, California (KSWB) – Officials with the San Diego County Sheriff’s Department said they were “not able to find any survivors” after a small business jet crashed near El Cajon, California, on Monday evening.

Federal investigators said the aircraft had taken off from Orange County with four people on board, but questions remain about the plane’s occupants. The jet crashed just east of El Cajon, in the Bostonia area, around 7:15 p.m.

It remained unclear Tuesday what caused the crash.

Surveillance footage from a Nest security camera shows the plane plummeting downward over the California neighborhood Monday evening. A flash of bright light, presumably at or after the moment of impact, was also seen in the video shared with KSWB.

As the Federal Aviation Administration and National Transportation Safety Board began their probe into the crash Tuesday morning, they deferred to local authorities for any firm confirmation about the passengers’ identities and whether there was a chance anyone survived.

In the meantime, the initial reports from federal investigators are shedding light on the crash.

Rick Breitenfeldt, an FAA spokesperson, confirmed the aircraft was a Learjet 35 business jet that had departed John Wayne Airport in Santa Ana, California. It was headed to Gillespie Field Airport in San Diego County with four people.

“The FAA and NTSB will investigate. The NTSB will be in charge of the investigation and will provide all updates. Neither agency identifies people involved in aircraft accidents,” Breitenfeldt said.

For its part, the NTSB had few details to share on the crash early Tuesday.

“The first NTSB investigator is expected to arrive on scene this morning,” agency spokesperson Peter Knudson said. “Two more investigators will arrive later today. Local authorities will provide information related to the accident victims.”

No one was hurt on the ground, but one home was damaged and power lines were knocked down in the area, the sheriff’s department said, causing more than 2,500 San Diego Gas & Electric customers to lose power after the crash. That number had been reduced significantly by early Tuesday.

Roads near the site of the crash remained closed and weren’t expected to reopen until Wednesday.

The crash comes a little over two months after a twin-engine Cessna crashed in another San Diego County community, Santee, where the plane’s pilot and a UPS driver on the ground were both killed. That crash also destroyed two homes and left a couple severely burned. In that case, the small plane had been intended for Montgomery-Gibbs Executive Airport in San Diego.