HOLCOMBE, Wis. (AP) – Chippewa County sheriff’s investigators say the cause and origin of a fire that killed three people and injured five others could take several weeks to determine.  Three of the five people injured in the fire last week remain hospitalized, including a 2-year-old boy.   Those that died in the fire include the owner of the home that burned, 82-year-old Robert Minder, 22-year-old Josh Peacock of Glen Flora and 5-year-old Joseph Sigsworth. Jr. Autopsies are expected to be done Monday.   Sheriff’s investigators and state fire marshal’s office have completed their investigative work at the house.  Fifty-one-year-old Darlene Minder, 2-year-old Dillon Minder and 30-year-old Tabatha Marie Jaworski remain hospitalized at Regions Hospital in St. Paul.