Conn. Gen. Stat. § 53a-180aa: Breach of the peace in the first degree: Class D felony.

(a) A person is guilty of breach of the peace in the first degree when, with intent to cause inconvenience, annoyance or alarm, or recklessly creating a risk thereof, such person places a nonfunctional imitation of an explosive or incendiary device or an imitation of a hazardous substance in a public place or in a place or manner likely to be discovered by another person.

(b) For the purposes of this section: (1) “Hazardous substance” means any physical, chemical, biological or radiological substance or matter which, because of its quantity, concentration or physical, chemical or infectious characteristics, may cause or significantly contribute to an increase in mortality or an increase in serious irreversible or incapacitating reversible illness, or pose a substantial present or potential hazard to human health, and (2) “public place” means any area that is used or held out for use by the public whether owned or operated by public or private interests.

(c) Breach of the peace in the first degree is a class D felony.