Six dead including three children in Tennessee domestic murder-suicide

Six people, including three children, were killed in an apparent murder-suicide in Tennessee.
A seventh victim was injured and hospitalized with gunshot wounds.
The suspect, identified as Gary Don Barnett, was found dead among the victims.
The home was set on fire, and authorities found six bodies upon arrival.
Autopsies will be performed, and the Tennessee Bureau of Investigation is handling the case.