An arson fire damaged a mobile home in Pullman Tuesday morning, according to Pullman Radio News. Pullman City Firefighters responded to the home in the Campus Vista mobile home park on Southeast Pro Mall Boulevard around 10:00 a.m. Firefighters quickly extinguished the fire. A dog was killed, but no people were injured. Fire investigators from the Pullman Fire Department, Pullman Police Department and Washington State University ruled the cause of the fire to be arson. PPD Commander Chris Tennant said investigators have identified a person of interest. Tennant said this incident is not related to the arson at the laser tag arena earlier this month.