13 year old boy drives truck into mail carrier, seriously injuring female driver.

A 13-year-old boy was allegedly behind the wheel of a pick-up truck when it ran a stop sign in Echo Park and collided with a mail truck, ejecting the mail carrier and pinning her beneath her vehicle, authorities said.

The crash happened about 3:30 p.m. on Douglas Street near Bellevue Avenue.

The boy allegedly took the pick-up truck from his home, a spokesperson with the Los Angeles Police Department Central Traffic Division said.

It’s not clear how far he made it before running a stop sign and slamming into a mail truck. Police said he initially left the scene of the crash but returned soon after.

The mail carrier was ejected from her truck and somehow pinned beneath her vehicle, police said. She suffered head trauma, a fractured dislocated hip and internal bleeding.

She was taken to a hospital in unknown condition.

The boy was booked for felony hit and run and driving without a license, police said. He was expected to be released to the custody of his parents.

Drugs or alcohol do not appear to be a factor in the crash, police said.