Federal investigators are still piecing together how a Tesla Cybertruck crash killed three college students in Northern California last month.

A fatal Tesla Cybertruck incident in Piedmont is being investigated by the National Highway and Traffic Safety Administration and California Highway Patrol after three Piedmont high school graduates died and another was hospitalized.

The mother of the survivor of Wednesday morning's horrific Tesla Cybertruck crash in the East Bay town of Piedmont that left three young adults from the East Bay community dead on Friday identified her son and the three other victims.

Three young individuals – since identified as Soren Dixon, Jack Nelson, and Krysta Tsukahara by the City of Piedmont – were pronounced dead at the scene. The person pulled from the Cybertruck suffered burns and was taken to an area hospital in critical condition but has not been identified. Their current condition is unknown.

Three people were killed when the Tesla Cybertruck they were riding in hit a tree and retaining wall in Piedmont, California and burst into flames.

A USC community continued to grieve after it was revealed a student athlete was among the people killed in a fiery Tesla Cybertruck crash on the day before Thanksgiving in Northern California.

PIEDMONT, Calif. -- Three people are dead and one is injured after a solo vehicle crash early Wednesday, police say. A Tesla Cybertruck crashed at Hampton road and King Avenue just after 3 a.m., in Piedmont, California.

One of the three people killed in a deadly Tesla Cybertruck crash in California's Bay Area on Wednesday was a USC student.

In a tragic incident early Wednesday, a Tesla Cybertruck crashed in Piedmont, California, resulting in three fatalities and one serious injury.

The National Highway and Traffic Safety Administration is in the process of reviewing details about last week's fatal Tesla Cybertruck crash in Piedmont that left three young adults dead and a fourth critically injured.

Responding officers used fire extinguishers, "but the fire was too intense for the extinguishers to be effective," the police chief said.