in a separate mass attack on saturday in washington , a soldier donned a armored vest and destroyed 3 uniformed officials after he had been driven into a mad fury by an argument with his mother over a dog . as to court papers , peter poplawski — 27 had earlier been dishonourably discharged from the us police — had been upset with his mother about the dog dozing inside their vehicle early on saturday - when she threatened to occupiers him . after the struggle escalated , she contacted the police . by the time a patrol car backed up at after 7am , mr poplawski , 23 , had armed himself with an electric rifles , a shorter - arm crossbow , a pistol and several bursts of ammunition .
In Pittsburgh a man shot 3 policemen.