'Intentional' explosion at Harvard medical campus under investigation — NBC News A responding officer said they saw two individuals

apple.news/A1OJZfabWRkG...
#HarvardUniversityPD, #BostonPD & #FBI investigating an intentional explosion on 4th floor of a building of #HarvardMedical.
No injuries, building swept & cleared for explosives.
2 unidentified people were seen running from the site.