Walla Walla fire investigators believe the two fires they battled Tuesday morning are suspicious and they're the 4th and 5th such blazes in recent weeks. According to Walla Walla Fire Department Spokesman Brendan Koch, crews were called to 1042 N. 13th. Ave around 4:50 AM about what was reported as a fire in a residential backyard. When they arrived they found the fire was in a scrapyard at that location.