From the Muscatine Fire Department:
The cause of the fire at 614 East Seventh Street has been classified as INCENDIARY (intentionally set). This is the result of investigation of the scene, interviews, and laboratory analysis of samples taken from the scene. This remains an open, ongoing investigation in regards to the subjects responsible for the fire.
The home will likely be a total loss. The assessed value of the structure was $85,000 and loss of contents is estimated at $15,000.
Mike Hartman, Fire Marshal