Around 4 a.m. Tuesday, a BMW sedan coupe somehow drove over an embankment near the Twin Peaks vista point and apparently tumbled down the hill towards the Twin Peaks reservoir where it sparked a small grass fire. Police say the vehicle's occupants have not been found as of this morning.

According to CBS5, witnesses in the area reported seeing the BMW speeding up and down the hill known for making cameos in car commercials. Witnesses described hearing a "boom" and a crash before seeing the flames. Authorities spent the morning searching for passengers who may have been ejected. In a helicopter photo from NBC Bay Area, the vehicle appears badly damaged and is lying smashed up on its side. Fire crews in wetsuits and dive gear began searching the reservoir for the driver around 7 a.m.

CBS5 has the raw chopper footage from this morning:

Last December, a Lexus SUV also rolled over an embankment at the vista point. Back in May, the driver of a Nissan minivan also lost their brakes while descending Twin Peaks boulevard and crashed into the side of a house on Clarendon Avenue.

Update: According to Bay City News, police discovered Tuesday morning that the driver is alive, but have not been able to contact him as of Tuesday afternoon. The car had not been reported stolen. A dive team search of the Twin Peaks reservoir turned up empty handed.

[NBC Bay Area]