A police officer and two firefighters have been treated and transported from the scene of a two-alarm fire in Boston's North End, Boston fire officials said.
The officer was treated for smoke inhalation, while one of the firefighters was treated for burns. The other firefighter's injuries are not yet known.
Boston fire officials say the blaze broke out in a vacant four-unit apartment building — and has been brought under control.
Boston's fire chief estimates damage at $1 million.