In what firefighters called a “horrific accident,” two teenagers were killed in a late-night crash with a dump truck in Southern California. Initial reports suggest that the truck caused the deadly collision, which occurred at the intersection of two highways.

It was shortly before midnight on June 24. The dump truck, which was carrying wet cement, was exiting Highway 15 where it meets the 138. Somehow, the truck driver lost control and crashed into a car with five young people inside that was headed west on the 138.

The impact forced the car to roll underneath the truck. The vehicles went down an embankment that led to a gas station, where they crashed into some cement posts in the parking lot.

It took firefighters nearly two hours to free the people inside the car, which was still trapped underneath the larger vehicle after the truck accident. All five people inside were between age 16 and 20.

Two of them, an 18-year-old woman and a 16-year-old male, were killed. The other three were taken to the hospital. One of the victims was later released, but the other two were still hospitalized as of June 25, according to KCBS-TV. All five were students or graduates of the same high school. The school was planning to hold a vigil in the victims’ memories the following day.

It remains to be seen what caused the dump truck to lose control. Common reasons for accidents of this type include excessive speed. Given the time of night, it is possible that the truck driver was going too fast, given the relatively dark conditions.

Source: Los Angeles Times, “Dump truck pushes PT Cruiser off 138 Freeway; 2 killed,” Caitlin Owens, June 25, 2014