Autopsies were being performed today on the victims, Tallahassee police spokesman David McCranie said.
The victims' names were not released, but neighbors and relatives identified them as a 28-year-old single mother, her 6-year-old twin daughters and her 3-year-old son.
"Right now I'm still kind of distraught," neighbor David Mount told Tallahassee television station WCTV.
"I really don't believe it, that I'm not going to see those little girls running around, up and down the street anymore," he said.
Mount, who has lived in his home just a few doors down from the victims for the past five years, said the neighborhood has been hit recently by break-ins and other crime, but nothing violent.
The single-story home is located in a relatively new subdivision a few miles from the state Capitol. It is surrounded by dense woods, and McCranie said the neighborhood is made up largely of young families.
"This is a very shocking and unusual case for us," he told The Associated Press.
The bodies were found after police received a suspicious call at 10:15 a.m. Saturday. Authorities had never been called to the home before then, McCranie said.
Police described the scene inside the home."There's obvious violence in the home," McCranie told CNN. "How that violence transpired, we're not sure."
He added that authorities hope to release more information about the investigation soon.
"Right now, it's putting all the pieces of the puzzle together," he said.
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