A massive blaze broke out in a Manhattan skyscraper Tuesday morning — close to the start of New York City’s St Patrick’s Day Parade, authorities said.

First responders rushed to the building near East 43rd Street and Madison Ave. just before 10 a.m.

Huge plumes of black smoke could be seen billowing from the building’s rooftop as sirens billowed out, footage shared by the FDNY showed.

Other clips shared on social media captured flames spouting from the top of the high-rise.

The inferno was sparked by a fire in the building’s air conditioning unit, police said.

Fire crews were able to knock out the flames before 11 a.m., when the parade kicked off.

No injuries were reported, according to cops.

It wasn’t immediately clear if the building was occupied at the time, but reports suggested it was under construction.

The city’s official emergency notification system warned of traffic delays, road closures, and mass transit disruptions as a result of the inferno.

Other clips shared on social media captured flames spouting from the top of the high-rise.

The city’s official emergency notification system warned of traffic delays, road closures, and mass transit disruptions as a result of the inferno.

The flames were put out shortly before 11, when the parade was set to kick off.