Three people were killed in a fiery crash in Monroe County late Monday, police said.The crash happened just before midnight in the 7800 block of South Victor Pike.Police said the car was southbound on Victor Pike when the driver missed a curve, drove off the road and struck a tree. When deputies arrived, the car was on fire. Three people inside were pronounced dead at the scene.The victims had not yet been identified Monday.Motorist Tim Cade arrived moments after the crash and tried to help, RTV6's Derrik Thomas reported."As I approached, I thought it was a bonfire. I was wondering what it was doing there, and I realized it was a car fire," Cade said. "I got out of the truck and tried to get the people out. The car was locked. When things started exploding, I took off running."Police are trying to determine if high speed or alcohol were factors in the crash.South Victor Pike is curvy and detectives said it appeared as though the driver failed to negotiate a curve at that point in the road. Police cannot tell if excessive speed or alcohol were factors in the crash.Monroe County Sheriff James Kennedy said the only clue about the victims identities was the license plate."The plate indicated it was registered through Lawrence County, Kennedy said.An autopsy was scheduled to be conducted in Terre Haute.