Update Monday, Dec. 20 at 3 p.m.: The Amber Alert for 14-year-old Hayley Giandoni has been discontinued after she was found. Authorities did not provide further details. 

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Original Story: Authorities issued an Amber Alert Sunday evening for a missing 14-year-old girl last seen in North Texas.

The Fairview Police Department is searching for Hayley Giandoni, 14, who was last seen at 6 p.m. Saturday on the 100 block of Stonehinge Dr. in Fairview, a town about 32 miles north of Dallas. 

Police believe Giandoni is in "grave or immediate danger," according to a news release.  

She's described as a white female who is five feet, four inches tall and weighs about 170 pounds. She has brown hair, brown eyes and was last seen wearing a gray sweatshirt and camouflage leggings. 

Police are looking for a suspect in connection with her abduction. A description of the suspect was not immediately available Sunday night. 

Anyone with information about Giandoni's disappearance is asked to call the Fairview Police Department at 972-886-4211.