A person who maliciously places any explosive or improvised device in, upon, under, against, or near any building, car, vessel, railroad track, airplane, public utility transmission system, or structure, in such manner or under such circumstances as to destroy or injure it if exploded is guilty of:
(1) Malicious placement of an explosive in the first degree if the offense is committed with intent to commit a terrorist act. Malicious placement of an explosive in the first degree is a class A felony;
(2) Malicious placement of an explosive in the second degree if the offense is committed under circumstances not amounting to malicious placement of an explosive in the first degree and if the circumstances and surroundings are such that the safety of any person might be endangered by the explosion. Malicious placement of an explosive in the second degree is a class B felony;
(3) Malicious placement of an explosive in the third degree if the offense is committed under circumstances not amounting to malicious placement of an explosive in the first or second degree. Malicious placement of an explosive in the third degree is a class B felony.