A teenager is shot in the head while ice fishing in a shanty on a lake in northeastern Minnesota lake. St. Louis County sheriff's officials say a .22 caliber bullet entered the top of the shanty on Shagawa Lake Wednesday evening and struck 18-year-old Ryan Byrnes in the back of the head. Authorities say the bullet didn't penetrate, but caused an injury that required medical attention. Byrnes told investigators he heard numerous gunshots on the lake before he was hit. Sheriff's deputies are investigating.