Somer Thompson Vanished After School, Seven-Year-Old Girl Missing in Orange Park, Fla.

Photo: Somer Thompson.

ORANGE PARK, Fla. (CBS/AP) An Amber Alert has been issued for missing 7-year-old North Florida girl Somer Thompson who vanished after school Monday.

UPDATE: Somer Thompson Murdered

Helicopters, bloodhounds, and more than 100 Clay County deputies and law enforcement personnel from neighboring counties were searching Monday and Tuesday in Orange Park for Somer.

Orange Park is a small suburb of Jacksonville.

The FBI has also assigned a member to assist Clay County, along with staff from the Florida Department of Law Enforcement, according to CBS affiliate News3Jax.

The second-grader is white, 3-foot-5 and 65 pounds. She had brown hair tied in a pony tail with a red bow and was carrying a purple Hannah Montana backpack and lunch box.

Somer was last seen about 2:45 p.m. Monday heading home from Grove Park Elementary School. She was walking with her sister and some friends, but ran ahead of them.

Anyone with information on Somer is asked to call 911, or the CCSO non-emergency line at (904) 264-6512. You can also call First Coast Crime Stoppers at 1-866-845-TIPS. Callers will remain anonymous and could receive a cash reward of up to $1,000.

UPDATE: Somer Thompson Murdered