One killed, one injured after vehicle strikes guard rail.

One man was killed and another injured after their vehicle struck a guard rail in South Dallas early Saturday morning.

Police responded to the scene in the 4600 block of RL Thornton Freeway at Ann Arbor Avenue at 3:18 a.m. According to police, no other vehicles were involved in the incident.
The driver of the vehicle managed to exit the vehicle following the crash, but later collapsed and was pronounced deceased.

The condition of the passenger is unknown.
Authorities are still investigating to determine factors that may have contributed to the crash.