A fire broke out in the parking structure of Nashville's main public library early Tuesday and explosions were heard.

Eli Gilmore, a Nashville musician who lives in the apartment building next door, said he heard loud explosions begin around 1:15 a.m. CDT (2:15 a.m. EDT/0615GMT).

On a FaceTime call with The Associated Press, he showed video of the building with smoke pouring out of it and emergency vehicles surrounding it. He said at least 50 firefighters were visible on the scene.

The city's fire department could not immediately be reached.

The public library’s garage is frequently used late at night by people heading to downtown bars.