The Florida Highway Patrol said four people were killed and three others injured in a crash near Miami.
Soldiers say a Chevrolet Tahoe was driving west on West Flagler Street early as Hyundai attempted to turn left on a flashing red light.
Investigators say a woman and three men inside the car died at the scene.
Three 16-year-old boys in Tahoe were taken to a hospital with injuries not believed to be life-threatening.
The investigation is ongoing.