Nov. 4 (UPI) -- Two male suspects were arrested Tuesday morning for allegedly setting off an explosive device inside a Harvard Medical School building early Saturday morning.

The two suspects are Logan David Patterson, 18, of Plymouth, Mass., and Dominick Frank Cardoza, 20, of Bourne, Mass., each of whom is accused of conspiring to damage, by means of an explosive, the Harvard Medical School Goldenson Building at 220 Longwood Ave. in Boston, the Department of Justice announced Tuesday.

FBI special agent Erin O'Brien submitted a criminal complaint in the U.S. District Court for Massachusetts in which she says there is probable cause that Patterson and Cardoza conspired to damage by fire or explosive device a building owned by an institution that receives federal financial assistance and is used in interstate commerce or in any activity affecting interstate commerce.

O'Brien said surveillance cameras at the intersection of Huntington and Longwood avenues at 2:23 a.m. EDT Saturday recorded two people walking toward the HMS campus.

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