A patient died Sunday after he was transported by helicopter to a local trauma center due to a single vehicle crash at the intersection of Shady Lane Road and Sierra Highway, according to officials.

“For unknown reasons,” said Sgt. Pack with the California Highway Patrol,” his car veered off the roadway.”

First responders arrived five minutes after the crash was reported.

Our engine company came upon a traffic collision and we (started setting up) equipment,” said Supervising Fire Dispatcher Michael Pickett.

The vehicle, a 2000 Chevy truck, “veered off the roadway, hit a dirt emankment, and continued (north) before coming to rest in a dry riverbed,” said Pack.

“At the time of transport by air, one patient was in full (cardiac) arrest,” said Picket.

Pack confirmed Monday that the patient had been declared dead upon arrival at Antelope Valley Hospital.

Sierra Highway was shut down at 4:21 for a helicopter to land and pick up the patient.