A massive fire ripped through a Brooklyn building Thursday evening, authorities said.

The five-alarm blaze broke out at 244 Montrose Avenue in Bushwick just after 6 p.m., the FDNY said.

Videos on social media show the flames bursting out of the top floors of the building as black smoke billowed into the night sky.

Firefighters can be seen on the roof of an adjacent building trying to put out the blaze, video shows.

Another video shows firefighters finally extinguishing the flames, which left the top of the building charred and destroyed.

Fire officials said no injuries were reported.

It’s unknown what caused the large fire. An investigation is ongoing.

Firefighters battle the five-alarm blaze at 244 Montrose Avenue in Bushwick, Brooklyn.

Gabriella Bass

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