Police are investigating a crash that tore a car apart, leaving one person dead in Santa Ana Monday night.

The single-vehicle crash occurred shortly after 11 p.m. in the 3900 block of Flower Street.

Officers arrived to find the mangled wreckage of a BMW 528i.

An unidentified occupant of the BMW was pronounced dead at the scene, a Santa Ana Police Department spokesperson confirmed.

The preliminary investigation indicated that the BMW was headed north on Flower Street “at a high rate of speed” when it hit a traffic signal pole, police said in a news release.

“The cause of the collision remains under investigation,” police said.

A SigAlert was issued in the area while police conducted their investigation.

No further details about the crash were immediately released.

Anyone with information is asked to contact Cpl. N. Quinones at 714-245-8216 or the SAPD Traffic Division at 714-245-8200