Irving police believe speed was a factor in a deadly crash on the city's south side.
It happened just after 2:00 Saturday morning.
When police arrived at the scene on Shady Grove Road, they found a man pinned under a car that had slammed into a mailbox.
He was thrown from the car and died at the scene, Irving police said.
A woman who was a passenger in the vehicle, was trapped inside the vehicle was taken to a local hospital.
She has serious injuries but is expected to survive, police said.