The Vermont State Police activated its Amber Alert system just before midnight Monday as part of what is now a three-state search for 2-year-old Hailey Traynham who is believed to be with her father, 38-year-old Gary Traynham.
Police in Maine say Hailey was taken from her mother late Monday morning in Sanford.
Police initially thought Traynham might have been traveling to the Lakes region of New Hampshire.
Traynham is thought to be driving a 1998 green Dodge 1500 pickup truck with Maine registration 8629NB.
He is described as 5 feet 11 inches tall, weighing 230 pounds with balding brown hair. Police say the girl has shoulder-length blond hair and blue eyes.