Two 14-year-old boys were struck and injured, one seriously, on Saturday afternoon in Sonoma when a 92-year-old driver failed to see them in a crosswalk with flashing warning lights.

The boys, whose names were withheld, were crossing Fifth Street West at Sassarini Elementary School at about 12:30 p.m. when they were hit by a 2003 Toyota Corolla driven by Levon Arkelian of Sonoma.

Arkelian, who was traveling south, told police he didn't see the boys.

The school crosswalk features yellow flashing lights embedded in the roadway. Both the boys and witnesses told police the warning lights were activated at the time of the collision, said Police Sgt. Spencer Crum.

One of the boys received a possible skull fracture and was taken by ambulance to Queen of the Valley Hospital in Napa. The injury didn't appear to be life threatening, but hospital staff were evaluating whether to transfer him to Oakland Children's Hospital, Crum said.

The other boy was taken to Sonoma Valley Hospital. He was treated for abrasions and released.

Neither alcohol nor speeding appeared to be factors in the collision, Crum said. The posted speed limit is 25 mph.

Police cited Arkelian for failing to yield for pedestrians in a crosswalk.

Based on Arkelian's inability to see the boys, police referred him to the state Department of Motor Vehicles for a priority reexamination of his eligibility to possess a driver's license, Crum said.