A sudden explosion shook a building at Harvard Medical School. The sound was loud and unexpected, causing alarm among students and staff.
Police and school officials quickly arrived at the scene. They secured the area and checked for danger. Thankfully, they announced that there were no injuries.
Investigators believe the explosion was intentional. This means someone caused it on purpose; it was not an accident. This information made the situation much more serious.
A key piece of information came from a witness. They saw two people running away just after the blast. The police now need to investigate who these people are and why they were running.