Covina man dies after freeway crash in Diamond Bar

DIAMOND BAR -- A 57-year-old Covina man died Friday after crashing his car into another car and a big rig, authorities said.
The dead man's name was not available pending notification of his family members, officials said. The death had not been reported to the coroner's office Friday afternoon.
The investigation remains ongoing, however it initially appeared the man may have suffered some sort of medical problem prior to the crash, California Highway Patrol Officer Randy Barge said.
He was driving his 2006 Chevy pickup truck behind a 2006 Toyota pickup truck and a slow-moving big rig just before the crash, CHP officials said in a written statement.
The driver of the Chevy lost control and struck the rear of the Toyota and the big rig, officials said.
The Chevy driver was unconscious when rescuers arrived, according to the CHP statement, and CHP officers and firefighters performed life-saving measures on the man as they took him to Pomona Valley Medical Center.
He died at the hospital at 7:48 a.m.
The damage to the Chevy did not appear consistent with a fatal crash, Barge said, and officials were looking into the possibility the man suffered a medical problem while behind the wheel.
The driver of the Toyota suffered a cut to his forehead but declined hospitalization, officials said, and the big rig driver was unhurt.
The crash is being investigated by the Santa Fe Springs office of the CHP.