The person who survived was transported via CARE Flight to a local hospital for treatment.
Deputies arrested Ryan Lenard Manigo on a charge of attempted murder, and he's currently being held at the Colleton County Jail.
At a press conference Monday, July 3, Colleton County Sheriff Guerry "Buddy" Hill Jr. said the 911 caller told dispatch there was a stabbing and a house was on fire with the victims still inside. Fire Rescue arrived at the scene and found the home "fully engulfed in flames." The 13-year-old survivor provided deputies with a description of the suspect, and officials located Manigo nearby.
Hill identified two of the victims as 50-year-old Michelle Marie Wright and 11-year-old Shariah Manigo. Ryan Manigo is Shariah's father and Wright's brother-in-law, and he is now being charged with two counts of murder.
The other four victims still need to be positively identified, though a family member told WCBD-TV that one of the victims was a 101-year-old woman.
Hill said investigators still do not have a motive.