MIDTOWN, Manhattan — Thick plumes of black smoke billowed into the sky from the roof of a building in Midtown Manhattan on Tuesday morning.

It happened at 6 East 43rd Street between Fifth and Madison avenues, about a block from Grand Central. Strong winds could carry the smoke across several city blocks.

The fire is a half of block off Fifth Avenue, near the start of the St Patrick’s Day Parade, but the parade was not be impacted.

Firefighters battled the blaze on the roof HVAC system.

It happened at 6 East 43rd Street between Fifth and Madison avenues.

It happened at 6 East 43rd Street between Fifth and Madison avenues.

The building is an office-to-residential conversion being renovated into 441 rental units, with 111 of them affordable housing.

The structure is largely vacant at the moment, with the exception of the 20,000-square-foot T-Squared Social venue operating on the ground level.

No injuries have been reported.

The cause of the fire is not yet known.

This story will be updated as more information becomes available.

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