Firefighters responded to a large fire at a building Monday evening in Manchester, New Hampshire.
The fire broke out just before 6 p.m. on Walnut Street. Firefighters say everyone was out before they arrived, but that one man was hospitalized with potentially life-threatening injuries.
Heavy flames could be seen shooting out of the home as thick, black smoke billowed into the air.
Neighbors say they heard loud booms.
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Investigators believe the fire started on the back porches of the two-family home.
The cause remains under investigation.
