LANSING, Iowa (AP) – Northwest Iowa authorities are investigating a shooting where a 27-year-old man injured himself.  The Allamakee County Sheriff’s office says the incident happened around 4:30 a.m. Sunday at a home near Lansing.   Authorities say Logan Bunn fired a gun at a tree outside the home, but the bullet bounced back and hit him.  Police were notified after Bunn showed up at a La Crosse, Wis., hospital. Bunn is expected to survive.   The sheriff’s office says no foul play is suspected.