Dallas Fire Rescue and Dallas police responded to call of a car sinking into White Rock Lake shortly after 9 a.m. Thursday.
Rescuers rowed out to the car in a small boat to see if it was occupied and attempt a rescue.
Firefighters could be seen using pike poles to break the car's windows as it slipped under the water, but officials said rescuers were not able to absolutely determine whether anyone was inside the car.
A dive team from the Dallas Police Department was then called to the scene. Officers were then able to determine that the car was not occupied.
Officials with the fire department said they weren't sure if the 911 caller saw the car go into the lake or if the caller simply spotted the car in the lake. How the car ended up in the lake remains a mystery.
The car is located about 50 feet off the shoreline near the 3800-block of W. Lawther Drive.