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An endangered-person alert has been issued for a 13-year-old Tucson, Ariz., girl police believe may be en route to Utah with a 19-year-old man.

The Pima County, Ariz., Sheriff's Department identifies the girl as Ashley Kingsbury, 5-foot-2 and 95 pounds with brown hair and hazel eyes. She went missing from her Tucson home on Monday.

Authorities say the man she is with is thought to be Jordan Anthony, who is 6-foot-1 and 140 pounds with brown hair and brown eyes. He may be driving a silver 2000 model Hyundai Elantra bearing a Utah license plate numbered Z75 4UV.

Ashley reportedly had been corresponding with Anthony through social networking sites. Investigators suspect the girl may have left with the man voluntarily after possibly setting up a meeting.

Anyone with information on this case is urged to call 911.