The FBI, Harvard University Police Department, and local police are investigating an explosion that occured on Saturday morning on the fourth floor of Harvard University's Goldenson Building, NBC News reported on Sunday. 

The Boston Fire Department believes the explosion was "intentional."

No injuries were reported.

After the building's fire alarm went off at 2:48 a.m., a Harvard University police officer responding to the call claimed to have seen two individuals fleeing the scene, according to NBC News.

The university released security footage of the suspects to aid the search. One, NBC reported, wore a balaclava, while the other wore a hoodie and a face covering.

This is a developing story.