An explosion at a Harvard University medical school building in Boston early Saturday is under investigation, authorities said. No injuries were reported.
CNN reports that an officer responded to the Goldenson building just before 3 a.m. and saw two people fleeing the building after a fire alarm was activated, according to the Harvard University Police Department.
Two masked people were later seen in surveillance footage, one of them wearing what appeared to be a gray ski mask and the other a long face mask and a black hoodie.
On the building’s fourth floor, it was apparent there had been an explosion — one that an arson team has initially assessed “appeared to be intentional,” police said.
Boston police swept the building for additional devices but none were found.
The area of the building where the explosion took place “has been cleared and is fully operational,” a message sent to the Harvard Medical School community Sunday afternoon said.
“There was no structural damage to the building, and all labs and equipment remain intact,” the message added. “Cleaning crews are on site to help ensure everything is ready for the beginning of the work week.”
