Barrington Police say Jean Haley, of Barrington, and Martha Williams, of East Providence, died Saturday.
Barrington Police Chief John LaCross said it appears the twins were returning to the home at around 8:30 p.m. Friday after going to dinner with their 89-year-old younger sister, who also lives in Barrington. Haley may have tripped on a rug in the garage as she tried to enter the house and call for assistance, the statement said.
They were both found outside Jean's home, with Martha face down near her vehicle in the driveway and Jean's body in the garage.
Haley, of Barrington, was subsequently found in the garage.
Both were found dead the next morning, and police believe they may have frozen to death. As the night wore on, temperatures dipped to 16 degrees. He said while loved ones are grieving the loss of the two sisters, they believe both would have preferred to die together than live without each other.
Police say the cause of death has not been determined but the extreme cold temperatures may have been a factor.
Nothing was missing from either of the sisters, or from the premises, leading investigators to think that no foul play was involved in their deaths. Relatives outside the isolated waterfront home said they were still in too much shock to speak to reporters on Sunday, the Providence Journal reports.