Authorities have activated an Amber Alert for a missing 8-year-old Nevada girl.

Authorities believe Lydia Bethany-Rose Rupp (search) was abducted Friday night from her home in Fernley. She's described as 4-feet 9-inches tall, 85 pounds with brown hair and brown eyes.

Authorities have identified the suspect as Fernando Aguero (search), a convicted sex offender who was last seen driving a silver or blue Kia Rio with no license plates.

Aguero is described as 47 years old with black/gray hair and brown eyes. He's 6-foot 1-inch tall, 175 pounds.

Authorities say Aguero has friends and relatives in the Las Vegas and San Diego areas and may be headed there.

Anyone with information was asked to call the Lyon County Sheriff's office at 775-463-6620 or 911.