‘Intentional’ Explosion Took Place at Harvard Medical School, Officials Say

An explosion took place in a building of the Harvard Medical School in Boston early on Saturday morning, the school’s police department said, in what the authorities described as an intentional act.

Two people were seen fleeing the building when a police officer from the Harvard University Police Department arrived at the scene, according to the police statement. The explosion was under investigation by local and federal authorities. The school police said no injuries were reported.