Two males were killed Saturday in a fiery single-vehicle crash on the San Bernardino (10) Freeway in West Covina.

The crash occurred about 4:30 a.m. Saturday on the westbound freeway at the Barranca Avenue on-ramp, the California Highway Patrol reported.

Investigators said they did not know why the 2021 Honda sedan veered off the road as it approached the off-ramp. The car veered onto the right shoulder and side-swiped a metal-and-wood guardrail, then crashed into a concrete slab and the metal pole of an overhead freeway sign, then burst into flames.

The driver and right-front passenger died inside the car, investigators said. It was unclear if there were any other occupants.

A Sigalert issued at 5:50 a.m. closing the on-ramp to the westbound freeway was canceled at 9 a.m., the CHP reported.