Caleb and Joshua Bledsoe appeared in Kittitas County Superior Court on Tuesday and were ordered held on $1 million bail pending possible charges.
The Daily Record reports firefighters put out a fire Monday at their home and treated 70-year-old William Bledsoe for smoke inhalation.
The probable cause statement says the brothers told police they set fires in the home with the idea the smoke would kill their father. Deputy Prosecutor Chris Herion says Joshua tried to hold the bedroom door shut.
All three worked at Bledsoe & Sons Gutters and Sheet Metal in Ellensburg.