They say the fire erupted on the top floor of the three-story brownstone at 4:27 a.m. Monday.
Nine people were in the Putnam Avenue house at the time. Three were taken to a hospital suffering from burns and smoke inhalation. The other six had minor injuries.
Four firefighters also were injured, one seriously.
Fire officials say none of the injuries are life-threatening.
The blaze was brought under control at 5:33 a.m. The cause was not immediately known.
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