DALLAS -- A Good Samaritan was killed and another was injured while helping a crash victim in Southern Dallas late Sunday night.

Police say two vehicles crashed near the Interstate 35E and U.S. Highway 67 split at about 11:15 p.m. One of the vehicles took off from the scene, leaving the other stopped on the road. Police are still looking for that hit-and-run suspect.

Michael Donnelly, 38, and Lyndsee Longoria, 26, stopped to help move the remaining vehicle, but an oncoming car hit both of them. They were taken to the hospital where Donnelly was pronounced dead. Longoria is in stable condition.

No names have been released.

The driver who hit them stopped at the scene, police said.

No charges are pending.