One person was killed Friday night in a single-vehicle crash near the area of Spring and Library Streets in Lake Elsinore, after deputies found the driver with significant injuries and tried life-saving measures at the scene.

The crash was reported around 9:30 p.m. Friday, and the driver was pronounced dead where the vehicle came to rest. Authorities did not release the driver's name, saying it would be withheld until next of kin could be notified.

The sheriff's Lake Elsinore station traffic team is investigating what caused the crash. That leaves the basic facts clear but the reason for the wreck still unknown: one vehicle, one driver, one fatal outcome on a Friday night stretch of road that now sits at the center of a traffic investigation.

Anyone with additional information was asked to contact Deputy Petersen at 951-245-3000. Investigators have not said whether speed, a medical issue or another factor played a role, and they have not given a timeline for when more details may be released.

For now, the case remains a reminder that a crash can turn fatal in minutes, and that the most important unanswered question is still the one investigators are working to answer: what caused the vehicle to leave the road or fail before help arrived.