The driver of a tanker truck was killed this morning, following a dramatic, fiery crash on Interstate 880.

Bay City News reports that the driver of the big rig was killed "instantly" in the crash, which occurred on 880 in San Leandro just before 4 a.m. near the Davis Street exit.

Following the crash, the truck immediately burst into flames, witnesses told the the California Highway Patrol. It's unclear what the truck was carrying, and a CHP spokesperson couldn't comment on that detail as of Wednesday morning.

At present, it's still unclear what caused the crash, according to the CHP. Other than the big-rig driver, who has yet to be identified, no other motorists reported injuries in the incident.