BOSTON (WHDH) - Two firefighters were hospitalized and seven people were forced from their homes after a multi-alarm fire tore through a duplex under construction in South Boston on Wednesday night.

Crews responding to a report of a fire at 409 East 7th St. around 5:30 p.m. found flames shooting from the rear of the wood-frame structure and thick smoke billowing into the air.

Video from Sky7 HD showed flames that had engulfed a rear deck near a cluster of other homes.

Two firefighters were transported with minor injuries — one suffering from smoke inhalation and one from a laceration.

People living in the homes next door were ordered to evacuate.

The home was unoccupied and under construction when the fire ignited.

“This is a building under construction so there was no plaster on the walls,” Deputy Fire Chief Jack Dempsey said. “The fire started in the basement area and quickly went up through the building because there is nothing to contain it.”

Six adults and one child have been displaced.

The cost of the damages sits somewhere around $2 million, according to fire officials.

The cause was not immediately clear.

This is a developing news story; stay with 7NEWS for updates online and on-air.

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