A 16-year-old from the southern Minnesota city of Sleepy Eye has been missing since Friday, May 10.
Tanner Klammer was last seen at school in New Ulm that day, the Minnesota Bureau of Criminal Apprehension says.
He'd been wearing a long-sleeved, brown camouflage shirt covered by a black T-shirt with yellow writing. He also had on jeans and a dark stocking cap.
Anyone with information about Klammer's whereabouts is "urged" to call the Sleepy Eye Police Department via the Brown County Sheriff's Office at 507-233-6700, or dial 911.