An accident Friday involving two cars and a motorcycle left nine people dead, Argentine official news agency Telam said, citing police.

Eight of the victims were pronounced dead at the scene, while the ninth died later at a hospital.

The accident occurred around 5:00 a.m. on the outskirts of San Pedro, some 160 kilometers (100 miles) west of Buenos Aires, when one of the vehicles collided head-on with another and hit a motorcycle on a curve of the highway.

As a result to the violent crash, one of the vehicles caught fire and its four occupants were burned to death, the motorcyclist was killed as were the four passengers in the second car.

The prosecutor investigating the accident, Gabriela Ates, suspects that some of the victims were under the influence of alcohol and drugs, since police found a beer bottle in one of the vehicles and "two white bags with a substance similar to cocaine."

The crash came hours after four members of the same family died in a collision in the northern province of Salta.

The vehicle in which the family was traveling hit a truck head-on in the town of Coronel Moldes, some 70 kilometers (43 miles) south of Salta city, the provincial capital.

The truck driver, who survived the accident without serious injury, is in custody pending completion of an investigation. EFE