A fire that destroyed a 12-bedroom home belonging to Aretha Franklin last year was intentionally set, investigators said.

The Oakland County Prosecutor's Office is reviewing a report on the arson early Oct. 25 that burned through the singer's unoccupied, 10,000-square-foot home in this Detroit suburb.

"No one's in custody, but we believe we know who set it," Bloomfield Township Police Chief Jeffrey Werner told The Detroit News for a Tuesday story.

Prosecutor David Gorcyca told The Oakland Press of Pontiac that charges could be issued as early as Tuesday.

"There are three separate points of origin in one room in the house," Gorcyca said. "The chemicals are similar to, and may be, lighter fluid. A known accelerant was used."

Franklin, 60, primarily uses the house for storage and lives in another in the township. She was on tour at the time of the blaze.