Boston Fire Department

Boston firefighters carried their equipment up 25 flights of stairs to battle a 3-alarm blaze that broke out late Saturday afternoon at a high-rise building under construction at 1 Nashua St., near the TD Garden.

The fire, which was reported at 4:20 p.m., quickly grew to three alarms. Smoke was already showing when crews arrived, officials said.

Dozens of firefighters fought the fire, which was put out by 5:30 p.m. Damages are estimated at $200,000, John Walsh, the department’s chief of operations, told reporters at the scene.

The cause of the fire is being investigated.

The sight of multiple fire trucks and firefighters crowding Causeway Street surprised Bruins fans arriving early for the team’s Saturday night game against the Ottawa Senators.


“I’ve never seen so many firetrucks or firefighters,” said Sarah Hillard, 22, who told the Globe she goes to about four or five games a year.

“This whole building and entrance, everything is new,” said Anthony Summers, 25, who was headed to the game with Hillard.

Hillard said a police officer told her that the fire would not interfere with the game, and arena officials confirmed that on Twitter Saturday night.

Adam Sennott can be reached at adam.sennott@globe.com