Investigators in northeastern Minnesota are identifying the three people killed in a plane crash late Saturday night in Hermantown.

The Hermantown Police Department says the Cessna 172 crashed into the second floor of a home and came to rest in the backyard.  Officers say 32-year-old pilot Tyler Fretland of Burnsville,  32-year-old Alyssa Schmidt of St. Paul and her 31-year-old brother, Matthew Schmidt, all died at the scene.  Two people sleeping inside the home were not injured.  The National Transportation Safety Board is trying to determine what caused the small plane to go down a few miles south of Duluth International Airport.