FBI Announces Two Arrests In Connection To Harvard Medical Building Explosion

They ran but they couldn’t hide.

The FBI has announced they have arrested two suspects who are allegedly connected to an intentional explosion at Harvard University’s medical building on Saturday morning.

On early Saturday morning, an “intentional” explosion went off on the fourth floor of Harvard’s medical campus resulting in immediate fire and police response.

🚨BREAKING: Special agents & officers with FBI Boston's Joint Terrorism Task Force & Harvard University Police Dept. have arrested two Massachusetts men in connection with an explosion at Harvard Medical School. Details to follow at a 1:00 p.m. news conference with @dmanews1 at… pic.twitter.com/nnEIi6GsSD

— FBI Boston (@FBIBoston) November 4, 2025

Fox News provided more in-depth details on the arrests:

The FBI’s Boston Field Office has announced that two men in Massachusetts have been arrested in connection with an explosion at Harvard Medical School on Saturday.

The arrests were made by the FBI’s Boston Joint Terrorism Task Force, with assistance from the Harvard University Police Department (HUPD).

Officials said more details will be released at a news conference Tuesday afternoon.

The explosion happened just after 2:45 a.m. Saturday in the Goldenson Building. Two masked suspects were seen fleeing from the building after the blast went off in a small section of the fourth-floor hallway, Harvard officials said on Sunday.

The section where the explosion happened has since been cleared and is fully operational, the university said. Officials added that the building did not sustain any structural damage and all labs and equipment remained intact.

#NOW: Federal officials announce the arrest of two men connected to a firework explosion inside a Harvard Med School building Friday morning.

Logan David Patterson, 18, of Plymouth and Dominick Frank Cardoza, 20, of Bourne will appear in court at 3:15 pm. @boston25 pic.twitter.com/SaoQZ4DXM8

— Daniel Coates (@danielcoates_25) November 4, 2025

AP reported on the identity of the suspects:

Logan David Patterson and Dominick Frank Cardoza face charges of conspiracy to damage by means of fire or an explosive, according to the charging document. Patterson, an 18-year-old from Plymouth, and Cardoza, a 20-year-old from Bourne, were arrested Tuesday morning and were due to be arraigned in federal court later in the day.

The explosion occurred early Saturday on the fourth floor of Harvard Medical School’s Goldenson Building, which houses labs and offices associated with the school’s neurobiology department. No one was injured.

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“Anxiety levels naturally rise when the public learns that an explosion was intentionally caused. I would say those levels may rise even higher in the Boston area,” U.S. Attorney Leah B. Foley said at a news conference, noting that the investigation is ongoing but that there’s no further threat to the university.