Authorities hunting for the assailant behind the 'execution-style' killings of eight family members in Ohio released  chilling 911 audio Saturday from the murder scene.

A woman who called 911 to report two of the eight slayings said in a recording that she found her brother-in-law dead and "blood all over the house."

In one made Friday morning, the out-of-breath caller says another person in the house also appears dead, and it looks like someone had "beat the crap out of them."

The Ohio attorney general said in a press conference Saturday that investigators and law enforcement worked through the night to gather information and execute search warrants to determine who shot eight family members in the head in rural southern Ohio Friday.

The victims, all members of the Rhoden family, were identified Saturday as 40-year-old Christopher Rhoden Sr.; his 16-year-old son, Christopher Rhoden Jr.; 44-year-old Kenneth Rhoden; 38-year-old Gary Rhoden; 37-year-old Dana Rhoden; 20-year-old Clarence "Frankie" Rhoden; 20-year-old Hannah Gilley; and 19-year-old Hanna Rhoden.

A Cincinnati-area businessman posted a $25,000 reward for information that leads to an arrest and conviction in the brutal slayings.

In a written statement, Attorney General Mike DeWine and Pike County Sheriff Charles Reader said the investigation into the killings of the Rhoden family is still in its early stages.

They said evidence continues to be processed and analyzed from the four properties near Piketon where the family members were found dead Friday.

DeWine told reporters earlier Friday that eight relatives – seven adults and a 16-year-old boy – were apparently shot in the head “execution-style.”

Pike County Sheriff Charles Reader said at least three young children survived. One was 4 days old, one was 6 months old, and the third was 3 years old. The youngest baby was found in bed next to the child’s dead mother.

“My heart goes out to my county,” Reader said.

DeWine said the family's last name was Rhoden, but did not give first names. "If I was a member of that family, I would be extra cautious right now," the attorney general added.

Reader later told a late night news conference he had spoken with the family and gave them "precautionary measures to take."

Asked if he had a message for the killer or killers, Reader replied, "we're coming."

Investigators said it was possible more than one shooter attacked the family because the homes were spread out roughly a mile and a half apart. Three of the four homes were on the same street in Piketon.

Officials said a preliminary investigation revealed that none of the eight killings were by suicide.

According to the Chillicothe Gazette, the first call of a possible fatality came at 7:53 a.m. The sheriff’s office received a 911 call reporting a possible death at a home owned by a Christopher Rhoden on Union Hill Road. Police found two bodies in that home.

While deputies were responding to that call, bystanders flagged authorities down and pointed them to two more houses on the same road. Five move bodies were found in those homes and the 16-year-old was later found at a home on Left Fork Road.

Pastor Phil Fulton told the Gazette that one of the victims was 37-year-old Dana Manley Rhoden, Christopher Rhoden’s ex-wife. Police haven’t confirmed those details

The Union Hill Church pastor opened his doors to the Rhoden family to help deal with their tragic losses. Fulton told WTTE-TV he’s here for them in this difficult time.

"This is a time I've learned over the years you put your feelings on hold that's hard to do but you embrace the family as you deal with the family this is where we rely on the lord," Fulton said.

He said he has no idea “what kind of evil person” would’ve killed members of the Rhoden family.

The church will remain open providing meals and other support for those affected by the tragedy, according to WTTE-TV.

Goldie Hilderbran said she lives about a mile from where she has been told a shooting took place — news she received from a mail carrier who told her deputies had an area blocked off.

"She just told me she knew something really bad has happened," Hilderbran said.

The Associated Press contributed to this report.

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