Boy, great-grandparents die in Florida house fire

A 6-year-old boy and his great-grandparents are dead following a fire at their rural central Florida home.

Polk County Sheriff's officials say the fire broke out early Sunday morning.

Authorities say 75-year-old Carolyn Ruff and Liam McLemore, who was visiting his great-grandparents, were taken to a hospital where they later died. The body of 82-year-old Walter Ruff was found inside the smoldering home.

Investigators were still trying to determine what caused the fire.

No further details were immediately available.