Explosions heard: Fire breaks out in Nashville library parking structure - watch video

A massive fire erupted in the parking garage of Nashville's main public library early Tuesday, triggering multiple explosions and sending thick black smoke billowing into the sky. Residents reported hearing around 20 explosions, initially fearing an attack. Musician Eli Gilmore, who lives nearby, witnessed cars exploding and a floor collapsing. At least 50 firefighters responded to the scene.