Driver killed after crashing into rear of tractor-trailer in San Diego County.

Authorities are investigating a fatal crash in Vista Friday morning that left a car crushed underneath a semi-truck.

The collision was reported about 5:50 a.m. on Park Center Drive near Business Park Drive, sheriff’s officials said.

A driver in a four-door sedan slammed into the back of the tractor-trailer leaving the car wedged underneath it. The driver was pronounced dead at the scene, officials said.

Further information about the victim and the circumstances of the accident have not been released.