University of Washington police arrest man on suspicion of driving stolen vehicle . The FBI also is assisting the probe , Vinson said . Police : Molotov cocktail , two very long knives , and a ballistic vest were in truck 's trunk . Prosecutors say he had knowledge of three university campuses . Truck , guns ##hot from Montana residence , police say ; driver is 21-year - old man from Nevada .
University of Washington police arrest man on suspicion of driving stolen vehicle . Police : Molotov cocktail , two very long knives , and a ballistic vest were in truck 's trunk . Prosecutors say he had knowledge of three university campuses . Truck , guns ##hot from Montana residence , police say ; driver is 21-year - old man from Nevada .