Woman critically injured, taken to hospital after roll-over accident on St. Route 125.

A 21-year-old woman was critically injured early Friday after being ejected in a rollover crash on state Route 125 in the East County.

The woman was driving south about 1:20 a.m. near Jamacha Road when for unknown reasons she made an unsafe move to the right and her car struck a light pole, said the California Highway Patrol.

The 2011 Mazda then rolled over and the woman was ejected. She was not wearing a seat belt.

Investigators have not determined what caused the driver to lose control of the car or if drugs or alcohol were involved.