UPDATE, 7:38p ET: Two Boston firefighters were killed in a nine-alarm fire in a four-story brownstone building in the city's Back Bay neighborhood, Councilor Josh Zakim says.

UPDATE, 5:25p ET: Boston EMS reports that 17 people have been taken to local area hospitals. 

Three firefighters have been sent to the hospital, with one in serious condition, as a nine-alarm fire rips through a Boston brownstone.

The fire broke out this afternoon at 298 Beacon St. in the Back Bay area. The building is a four-story, multi-family home that was built in 1871 and is valued at $1.6 million.

AMAZING RESCUE: Worker Dangles From Building Amid Massive Inferno

Authorities are doing a check to determine whether or not all firefighters are accounted for. There are no reports of missing residents.

Winds in the area are gusting up to 45 mph as crews work to get the fire under control.

The Boston Fire Department says firefighters are battling the flames externally. Authorities say it will likely be several hours before crews are able to get inside.

The Boston Fire Department has called for all hands on deck.

Check out some pictures of the scene below.