BOSTON (AP) — Two Massachusetts men have been arrested in connection with a weekend explosion at Harvard Medical School, authorities said Tuesday. The FBI’s Boston office announced the arrests on social media ahead of a 1 p.m. news conference, but didn't disclose further details. The explosion occurred early Saturday on the fourth floor of Harvard Medical School’s Goldenson Building, which houses labs and offices for the neurobiology department. Thankfully, no injuries were reported, and school officials confirmed there was no structural damage to the building or its equipment. The Boston Fire Department deemed the explosion intentional, with police finding no additional devices in a sweep of the area. Interestingly, an officer responding to a fire alarm encountered two people fleeing from the scene.