KNIGHTSEN (CBS SF) — Two teens were killed Saturday night after they were struck by a suspected drunken driver while walking along a road in Knightsen, authorities said.

The California Highway Patrol said officers responded to reports of a vehicle collision involving pedestrians at 8321 Byron Highway in east Contra Costa County at about 11:14 p.m.

Knightsen Crash Memorial

Makeshift memorial in Knightsen following deadly hit-and-run crash. (CBS)

CHP Officer Brandon Correia said an 18-year-old Pittsburg woman and 16-year-old Oakley boy were at a large gathering and were walking along the road when they were hit by a 2002 Subaru Impreza.

The Subaru’s driver, an 18-year-old Knightsen man, was arrested on suspicion of felony driving under the influence and gross vehicular manslaughter.

The victims’ names were being withheld pending notification of next of kin.