Two 15-year-olds from Long Beach were among the five people killed in an early-morning crash on the 710 Freeway, officials confirmed.

The solo-car crash was reported at 4:12 a.m. Monday on the northbound 710 at the transition to the 91 Freeway, according to the California Highway Patrol.

The car crashed into an attenuator on the 710 Freeway in Long Beach and burst into flames, according to the CHP. A sixth person in the car was taken to a hospital with major injuries.

In an email, a spokesperson for the Los Angeles County Coroner’s Office said two of the victims were George Dobbs and Ariahh Slemaker, both 15 and residents of Long Beach. The other victims had not been publicly identified Monday afternoon.

It’s not clear what caused the wreck. CHP spokesperson Angelia Gonzales said the black Hyundai Sonata was going northbound at an unknown speed when it veered to the right for some reason and hit the attenuator between the transition road to the 91 from the main lanes on the 710.

Gonzales said CHP’s ongoing investigation of the crash determined there were six people in a car that seats five and it appeared not everyone was wearing a seatbelt. The agency reminded drivers to make sure there’s a seat for everyone in their vehicle and that they use their seatbelts.

Gonzales asked anyone with information about the crash to call investigators at 424-551-4000.

City News Service contributed to this report.

Editor’s note: This story has been updated with the identity of two of the people killed in the crash.