An investigators says the deaths of 5-week-old twins being cared for by their father are being investigated as potential homicides based on the autopsies.

Baraboo Police Department Lt. Rob Sinden says the autopsies of Savannah and Tyler Yates are not complete but the preliminary findings suggest they may have been murdered. He declined to elaborate.

Officers who went to the home Sunday found the babies dead and their father, 45-year-old David R. Yates, in bed.

Sinden says Yates remains hospitalized Tuesday and in police custody on probation violations. He would not say why Yates was taken to the hospital.