A fire that residents say followed an audible explosion sent shattered glass from a third-floor window of an apartment building on Alamitos Avenue in Downtown Long Beach tumbling down to the sidewalk Saturday afternoon.

Cruz Juarez, a nearby resident, said no one was walking by as the glass hit the pavement.

“It was a big explosion.” Juarez said. “Everyone heard it.”

Cruz and other neighbors rushed to the building to let anyone inside know a fire was staring to spread where the window had been blown out.

Multiple fire and police vehicles rushed to the scene. A perimeter was set to block southbound traffic on Alamitos Avenue and a fire truck’s ladder was deployed onto the top of the apartment building.

Fire crews seemed to have extinguished the fire within several minutes as crews wrapped up their fire hoses and retracted rescue ladders.

It was not immediately clear if there were any injuries or what might have caused the fire and explosion.