Those aren't "explosives", they are explosives. Google death/maiming by fireworks for examples.
No, the fact that people occasionally get hurt by accident with fireworks does not make the violent subtext in "attacking a government building with explosives" a correct description of the situation.
No, the fact that people occasionally get hurt by accident with fireworks does not make the violent subtext in "attacking a government building with explosives" a correct description of the situation.