SANTA CLARITA, Calif. — Authorities say a 10-year-old girl who was found unconscious last week after riding a roller coaster at Six Flags Magic Mountain in Southern California has died at a hospital.

Coroner’s Assistant Chief Ed Winter said Monday that Jasmine Martinez of Somis died Saturday at Cedars-Sinai Medical Center in Los Angeles.

An autopsy will determine the cause of death.

The Los Angeles County Fire Department said the girl and a parent were airlifted Friday from the park in Valencia.

The amusement park released a statement that said the girl was found breathing but unconscious after riding the Revolution.

The 113-foot-high looping steel coaster reaches speeds of 55 mph during a two-minute ride.

The Revolution was cleared to reopen shortly after the incident.

The coaster has been at the park since 1976.