This seems to be true according to multiple sources. While the word choice in the headline is slightly misleading, many news outlets report the explosion occurring. Using the word intentional makes the cause feel ambiguous and could be interpreted by readers as the explosion being part of a demolition effort. Both CNN and The Guardian backed up the facts in the article that pointed to two masked individuals setting off fireworks in a Harvard Medical School Building. No people were harmed, and there was no major structural damage done to the building.
All of the sources also stated that there was no clear motive. The pair that caused the explosion were able to enter the building through the roof access. The two men filmed the explosion and showed it to friends, leading to their arrests by the FBI. They will be charged in federal court and are currently awaiting arraignment.
