KALAMAZOO, Mich. (NEWSCHANNEL 3) - The Kalamazoo County Sheriff's Department has issued an Amber Alert for Savanna Michelle Gay, 15, from Kalamazoo. 

Savanna goes by the alias "Savanna Nimmo". She is described as a white, 5 feet 4 inches, 100 lbs. with brown hair. She was last seen wearing a white coat with fur around the collar, blue sweat pants and slippers.

Police say the teen may have been taken by force from an address on East O Avenue by a former friend. 

Police say the suspect is 20-year-old Diane Jean Bridges. She is described as 5 feet 7 inches tall, 140 pounds, with a very short buzzed haircut. Bridges may be driving a white Chevrolet Corsica toward Hessel, Michigan or an unknown location in Calhoun County.

Anyone with information is asked to dial 911, or call the Kalamazoo County Sheriff's Office at (269) 383-8822, ext. 6.