A tragic house fire in Grand Meadow, Minnesota, has been ruled a murder-suicide.
Levi Christenson (38) and his sons Oliver (14), Felix (14), and Calvin (seven) all died.
Investigators believe Christenson shot his children before taking his own life.
The cause of the fire is still being looked into.
Online fundraiser supports mother Lauren Hosp
The loss has deeply affected the local community, who are now coming together to support the boys' mother, Lauren Hosp, through an online fundraiser.
Sheriff Steven Sandvik has asked everyone to respect the family's privacy during this tough time.