KOMO-TV ABC 4 AND RADIO 1000, TACOMA, WA - There have now been at least 16 suspicious fires in Tacoma and the surrounding area since Tuesday night. Three more fires were reported overnight into Thursday, according to the Tacoma Fire Department. Firefighters say there was one in the 700 block of S. 56th Street, a shopping cart full of items, which were set on fire. There were also two vehicle fires, one in the 500 block of S. 78th Street and the other in the 1000 block of S. Mildred Street. The second ended up catching a carport on fire. Officials say all three have arson investigators looking into it. Law enforcement officers in Tacoma, Ruston and special agents with the Bureau of Alcohol, Tobacco, Firearms, and Explosives are working to determine who is responsible for the string of suspected arsons.