Harvard Medical School reported an explosion on campus that officials now describe as intentional; surveillance footage captured two individuals fleeing the scene and the school has asked the public to help identify them. Authorities are treating the blast as a deliberate act while investigators work to determine motive and potential suspects. The incident forced immediate campus security responses and a review of lab and building access protocols at one of the world’s leading research universities. University officials have not disclosed injuries or detailed damage, but the event raises urgent compliance and safety questions for medical and research facilities that house hazardous materials. Faculty, staff and research continuity are likely to be affected as investigators and campus security assess whether sensitive research spaces were impacted and whether additional protective measures are needed.