(UPDATE 2 p.m. ) – 77-year-old Darlene McDonald has been identified as the woman whose remains was found in a fire Thursday morning in St. Joseph.

The St. Joseph Fire Department was called out to a home at 3304 E. Devonshire Dr. just before 7 a.m.

Mike Neylon with the St. Joseph Fire Department said crews have found McDonald’s remains inside of the home.  He said an autopsy to determine the cause of death will be performed.  McDonald was living with her daughter and grandson.

A cause of the fire is still undetermined.

“We have not found an ignition source at this time so we don’t know why the fire happened,” Neylon said. “One of the ladies that lived there had left a few minutes before and when she came back it was completely engulfed.”

He said the resident had left for about 30 minutes.

“Not sure where the fire started.  It came in as the back of the house was on fire and it quickly went straight up into the structure,” Neylon said. “These new homes once they get a good hold going on fires they burn rapidly.”

Neylon said CSI was called in as standard procedure to investigate the fatality.