Authorities have identified the two boys who were found dead inside their grandparents' home in Jackson this week.
The boys, 12-year-old Austin Wiseman and 9-year-old Blake Campbell, were living in their grandparents' home at 38 E. South St.
The boys were found shot to death in an upstairs bedroom.
According to Jackson County Coroner Dr. Gregory Hawkins, the Franklin County coroner determined that both boys died as a result of bullet wounds to the head.
The deaths were ruled a murder-suicide, and the sheriff's office tells NBC4 it appears the oldest boy shot his younger brother before shooting himself.
Investigators said they believe that Wiseman shot Campbell with a .44-caliber gun that was found in the bedroom.
Officials said there was no note or anything to indicate intent.
Police are investigating the shooting, but said they are not searching for anyone who might have been involved in the shooting.
Jackson is a small town of 6,500 people, and the deaths have shocked residents.
"This is one of the unspeakable tragedies no community ever wants to deal with," said Jackson Mayor Randy Heath. "I'm sure a great number of parents and grandparents all went to bed thinking, 'Is there any way we can make our children safer?' And hopefully we'll have some parents thinking maybe we need to take that extra step."