Westbound Highway 92 a half-mile west of Interstate 280.

BELMONT — A Los Gatos woman killed in a four-car collision on Highway 92 on Saturday night was the mother of the suspected drunken driver who investigators say caused the deadly crash.

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Saida Magomedova, 70, was a passenger in the 2009 Mercedes-Benz coupe driven by 34-year-old Arsen Tarkovskiy that reportedly veered into oncoming traffic at 8:44 p.m. Saturday, according to the San Mateo County Coroner’s Office and California Highway Patrol.

The Mercedes was westbound on Highway 92 just past Interstate 280 in the hills above Belmont. It crossed over the double-yellow lines and ran into the left sides of an eastbound 2002 Honda and 1998 Pontiac, then hit a 2003 Volvo head-on, according to the CHP account.

Magomedova was pronounced dead at the scene. Tarkovskiy, her son, was extricated from the wreck of the Mercedes and taken to Stanford Hospital with major injuries.

Tarkovskiy is still at the hospital and technically in the custody of the CHP, which arrested and booked him on suspicion of felony DUI and vehicular manslaughter with gross negligence. He is expected to be transferred to the San Mateo County jail once he is released from medical care.

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The driver of the Volvo that was hit head-on, a 30-year-old Half Moon Bay woman, was treated for minor injuries. The Honda and Pontiac drivers, also Peninsula residents, did not report any injuries.

CHP investigators are seeking public tips from witnesses or anyone who has information about Tarkovskiy’s whereabouts and activities leading up to the crash. Tips can be left with the CHP at 650-369-6261.