Authorities probing the disappearance of a 15-year-old California girl said Monday they're looking for a vehicle they believe is connected to the teenager's abduction.

The Santa Clara County Sheriff's Office released a photo of a 1990s red Volkswagen Jetta that's similar to a car linked to the kidnapping of Sierra LaMar, who has been missing for nearly two months. 

Investigators said they believe the girl was snatched early March 16 while walking to a bus stop near her home in Morgan Hill, Calif. 

Sheriff's Sgt. Jose Cardoza said the red sedan being sought has a black hood. Police said the vehicle was spotted at the time and place where LaMar disappeared, though it is not known if the girl was riding inside it, according to the San Jose Mercury News. 

"It's more than a coincidence," Cardoza told the newspaper. Information on the vehicle was reportedly gathered from witness accounts and surveillance video. 

Meanwhile, crime lab technicians continue to analyze possible evidence found during searches for Sierra.

Cardoza said they've determined a handcuff box and used condoms found within a mile-and-a-half of her home are not associated with the case.

Anyone with information on the girl's disappearance is being urged to contact sheriff's investigators at (408) 808-4500 or the anonymous tip line at (408) 808-4431.

The Associated Press contributed to this report.