Police confirm intentional explosion at Harvard Medical School; no injuries reported, and no additional devices found.

A Harvard University Police Department officer said he saw two "unidentified individuals fleeing from the building."

BOSTON: There was an explosion early Saturday at Harvard Medical School that appears to have been intentional, but no one was injured, authorities said.

The FBI, local and university police are investigating an "intentional" explosion early Saturday inside the Harvard Medical School building in Boston.

Police confirm intentional explosion at Harvard Medical School; no injuries reported, and no additional devices found.

No one was injured and officers did not find additional devices in a sweep of building, police say

Two Massachusetts men have been arrested in connection with a weekend explosion at Harvard Medical School, authorities said Tuesday.

Two male suspects were arrested Tuesday morning for allegedly setting off an explosive device inside a Harvard Medical School building early Saturday morning.