BOSTON (AP) — Two Massachusetts men were arrested Tuesday in connection with a weekend explosion at Harvard Medical School, authorities said.

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.

“Anxiety levels naturally rise when the public learns that an explosion was intentionally caused. I would say th

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