NAPA -- Police said Tuesday that the two women who were killed in an upstairs bedroom of their Napa home died of multiple stab wounds.

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Cmdr. Andy Lewis said an autopsy was conducted Tuesday on 26-year-old Adriane Michelle Insogna and Leslie Ann Mazzara, also 26.

They were found around 2:07 a.m. Monday in an upstairs bedroom of the home they were renting in the 2600 block of Dorset Street in West Napa.

A third resident of the home heard a struggle, fled unharmed and called police on a cell phone.

Insogna was employed by the Napa County Sanitation District and was a part-time student at Napa Valley College. She was also a volunteer scorekeeper for the Napa County women's volleyball team, Lewis said.

Mazzara was employed with the Niebaum-Coppola Estate Winery in Rutherford, Lewis said.

Police have not commented on a motive for the murders.