The explosive charge is detonated by a detonator. Mercury fulminate is a detonator widely used in explosives. The fuze burns down to the detonator, which explodes the main charge. The explosion of a bomb may be triggered by a detonator or a fuse. This started the time fuze, which fired the detonator after a delay. The bomb is again a 250kg bomb with a double detonator. Kimberly presses the detonator and the building explodes. These are physical connections between the detonator and explosive device and cannot be jammed. Based on the type of detonator and explosive involved, German authorities assume "terrorist involvement". A detonator and a timing device were attached to the sacks. Upon being triggered, the thyratron conducted a large current that set off the electrical detonator. The third incident, at Omagh, produced no casualties due to a faulty detonator. The apparent detonator was actually an electronic tuner. After disabling the detonator, Ewan leaves the hotel. A small device thought to have possibly been a hand-held detonator was also found.