Kanawha County Sheriff's Office said a fifth juvenile resident of the house — a 16-year-old brother — was later safely located elsewhere.
In a subsequent update, the Sheriff's Office announced that a juvenile had been charged with all four murders.
Authorities did not reveal if the accused was the fifth resident of the home, adding in a statement: "It is unlawful for our agency to release more information regarding juvenile offenders."
However they said the crime did not appear to be random, and assured neighbors they were not in danger.
"We do know that a family member tried to get a hold of them yesterday and were unable to do so, and when they couldn't get a hold of them again this morning, that's when one of the family member came to check on them, and that's when they were found," Sheriff Mike Rutherford confirmed to WOWK.