Kehoe had used Using a timed detonator to detonate Attack hundreds of pounds of dynamite and incendiary pyrotol , which he had secretly planted Placing inside the school over the course of many months .

The hijacker , Russian Alex Hildebrandt , had a fully loaded sawn-off .22 calibre rifle and had suspended Process_end over a torch battery a bare wire attached Connect to a detonator adjoining two sticks Motion of gelignite .

The soldiers each testified Statement that they had opened fire in the belief that the suspected bombers were reaching Arriving for weapons or a remote detonator .

In each case , only the detonator caps fired Use_firearm and the bombs themselves did not go off ; this may have been due to the low quality hydrogen peroxide used Using in the devices , which had been obtained Getting from a large number of easily available sources .