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Dave Collins, Associated Press
A fire truck sits at the scene of a fire Wednesday morning, Dec. 10, 2014, at a two-family home in Enfield, Conn. Officials said at least four people were unaccounted for.

ENFIELD, Conn. — An early morning fire swept through a two-family house in northern Connecticut and officials say four people are unaccounted for.

The front of building on the Connecticut River in Enfield is burned out with a partially collapsed roof and charred interior walls. A woman who arrived saying her sister was inside was ushered past the yellow tape put up around the house.

Firefighters responded to the fire at about 6:15 a.m. Wednesday in Enfield, about 20 miles northeast of Hartford.

Fire department spokesman Mark Zarcaro says the four missing people range in age from 40 to their late 60s. He says five others who had been inside the house were evacuated safely.

Zarcaro says part of the second floor collapsed into the first floor, and firefighters have been trying to stabilize the building before entering.